NEED ANSWER ASAP!!!
The following equation has an unknown (a) as one of its coefficients for x. If this equation has no solution, what is the value of a?
7x−9x−10=2(x−4)−ax

Answer:

i think its either the 2nd or 3rd awnser

Step-by-step explanation:

Answer:pour some milk on it so you dont gotta do it

Step-by-step explanation:

Ur teacher will kick you out of the class and try drying the paper but ends up throwing it away

Answer:

9^(-1/2) = 1/3

27^(-2/3) = 1/9

Step-by-step explanation:

We know that:

\( \displaystyle \large {{a}^{ - n} = \frac{1}{ {a}^{n} } } \\ \displaystyle \large { {a}^{ \frac{m}{n} } = \sqrt[n]{ {a}^{m} } }\)

If we add negative sign in m/n.

\( \displaystyle \large{ {a}^{ - \frac{m}{n} } = \frac{1}{ {a}^{ \frac{m}{n} } } }\)

Therefore,

\( \displaystyle \large{ {a}^{ - \frac{m}{n} } = \frac{1}{ \sqrt[n]{ {a}^{m} } } }\)

From the expression:

1. 9^(-1/2)

\( \displaystyle \large{ {9}^{ - \frac{1}{2} } = \frac{1}{ \sqrt{9} } }\)

From above, apply the exponent rules. Simplify the expression:

\( \displaystyle \large{ {9}^{ - \frac{1}{2} } = \frac{1}{ 3 }}\)

2. 27^(-2/3)

\( \displaystyle \large{ {27}^{ - \frac{2}{3} } = \frac{1}{ \sqrt[3]{ {27}^{2} } } }\)

27 can be factored as 3^3.

\( \displaystyle \large{ {27}^{ - \frac{2}{3} } = \frac{1}{ \sqrt[3]{ { ({3}^{3}) }^{2} } } }\)

From above:- Use the following exponent rules to multiply the exponents and leave the base as 3 so we can cancel the cube (3 out of the root) and the exponent.

\( \displaystyle \large{ {27}^{ - \frac{2}{3} } = \frac{1}{ \sqrt[3]{ {3}^{6} } }}\)

Divide 6 by 3 or the cube root.

\( \displaystyle \large{ {27}^{ - \frac{2}{3} } = \frac{1}{ {3}^{2} }}\)

Therefore:

\( \displaystyle \large{ {27}^{ - \frac{2}{3} } = \frac{1}{ 9}}\)

Answer:

4 + 4 = 8

Step-by-step explanation:

Answer:

(5,-1)

Step-by-step explanation:

To take the reflection of a point across the y-axis, simply take the negative of the y-value. Therefore, to reflect Point P, (5,1), you just turn the 1 into a -1 so your result is (5,-1).

The reflection of point P(5, 1) is C(5, - 1) accross the x-axis.

Two-dimensional figures can be transformed mathematically in order to travel about a plane or coordinate system.

Dilation: The preimage is scaled up or down to create the image.

Reflection: The picture is a preimage that has been reversed.

Rotation: Around a given point, the preimage is rotated to create the final image.

Translation: The image is translated and moved a fixed amount from the preimage.

Given, On a coordinate plane, point A is (- 4, - 1), point B is (- 4, 1), point C is (5, - 1), and point D is (5, 2) and Point P is at (5, 1).

We know the reflection of a point(x, y) across the x-axis is (x, - y).

Therefore, Reflection of point P(5, 1) across the x-axis is P'(5, - 1).

Now, P' is equal to C.
So, C(5, - 1)  is a reflection of Point P across the x-axis.

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The dimensions of the poster with the smallest area is 50/3 cm × 5/2 cm.

As per given data in question:

Top and bottom margins = 2 cm

Side margins = 6 cm

Area of printed material = 384 square centimeters

Let the length of the poster be "l" and the width be "w".

Then we can write the area of the poster as,

Area of poster = IW

The area of printed material is fixed and is given to be 384 sq.cm.

We can write this as:

Area of poster - area of margins = area of printed material

(l - 2(6)) (w - 2(2)) = 384

lw - 20l - 4w + 24 = 384

lw - 20l - 4w - 360 = 0

lw - 5l - w/4 + 90 = 0

The area of the poster is lw. So, we need to minimize this area.

We can use calculus to find the minimum value of lw.

lw - 5l - w/4 + 90 = 0

Differentiating w.r.t l, we get:

w - 5/2 - 0 = 0

w = 5/2

Hence,

lw - 5l - w/4 + 90 = 0l × 5/2 - 5l - (5/2)/4 + 90 = 0l = 50/3 cm

So, the length of the poster is 50/3 cm and the width of the poster is 5/2 cm.

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Answer:

for the first one I got y=-2x-2 the second part i got y=-x-1 or -1x-y-1=0  Correct me if I am wrong

Step-by-step explanation:

Use the slope formula

-4-4 =-8

  /               =-2

1 - -3=4

2. The second part use this formula y-y1=m(x-x1)

     y--4=-1(x-3)

y+4=-x+3

  -4      -4

y+0=-x-1

 y=-x-1      or -1x-y-1=0    I am not sure  

Answer:

......................................................................................................oof

Step-by-step explanation:

The sun would more frequently be reaching the ground at a high angle at latitude 0° (the equator). Option A is correct.

What is latitude?

Latitude is the angle north or south of the equator and extends horizontally over the globe. Longitude, on the other hand, runs from east to east and runs vertically across the globe.

On any given day, only points on Earth's surface that are located along a single line of latitude can experience sunlight at a 90-degree angle. Lower levels of sunshine are present everywhere else. The sun's beams are typically strongest at the equator and weakest at the poles.

Option A is correct,0° (the equator).

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When you know the roots of a quadratic equation, you can write the quadratic function in standard form by using the factored form and then expanding and simplifying the expression

The factored form of a quadratic equation is given as:

f(x) = a(x - r1)(x - r2)

where a is the leading coefficient, r1 and r2 are the roots of the quadratic equation.

To convert this factored form into standard form (ax² + bx + c), we need to expand and simplify the expression.

Let's consider an example to illustrate the process. Suppose we have the roots r1 = 2 and r2 = -3.

The factored form of the quadratic equation would be:

f(x) = a(x - 2)(x + 3)

Expanding the expression:

f(x) = a(x² + 3x - 2x - 6)

Simplifying further:

f(x) = a(x² + x - 6)

Now, to convert the expression into standard form, we need to multiply out the terms:

f(x) = ax² + ax - 6a

Therefore, the quadratic function in standard form, given the roots r1 = 2 and r2 = -3, is:

f(x) = ax² + ax - 6a

When you know the roots of a quadratic equation, you can write the quadratic function in standard form by using the factored form and then expanding and simplifying the expression. The standard form of the quadratic function will have the form ax² + bx + c, where a, b, and c are coefficients.

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Answer:

The side lengths will form a triangle because 6+4 > 7

Step-by-step explanation:

For side lengths, the two smallest sides (ex. 6 and 4) must have a greater sum than then highest side length. Since 6+4 is greater than 7, it creates a triange. If it would have been 5+2 it would not have worked because it needs to be greater than, not less than or equal to.

The exact values are (a) sin^(-1)(1/2) = π/6 (b) cos^(-1)((√3)/2) = π/6 (c) arcsin(sin(5π/4)) = -π/4 (d) sin^(-1)((√3)/2) = π/3

(a) To find the exact value of sin^(-1)(1/2), we need to determine the angle (in radians) whose sine is 1/2. The angle is π/6 or 30°. So, sin^(-1)(1/2) = π/6.

(b) To find the exact value of cos^(-1)((√3)/2), we need to determine the angle (in radians) whose cosine is (√3)/2. The angle is π/6 or 30°. So, cos^(-1)((√3)/2) = π/6.

(c) To find the exact value of arcsin(sin(5π/4)), we first find the sine of the given angle (5π/4). Then, we find the arcsin of that value. Since sin(5π/4) = -√2/2, we have arcsin(sin(5π/4)) = -π/4, as per the provided term.

(d) To find the exact value of sin^(-1)((√3)/2), we need to determine the angle (in radians) whose sine is (√3)/2. The angle is π/3 or 60°, as per the provided term. So, sin^(-1)((√3)/2) = π/3.

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Answer: B

Step-by-step explanation:

if he went from 3 ft under and proceeded to go 2 more feet, he’ll end at at 5 feet under (-5 ) making B the right answer with -3 to -5

Answer:

B

Step-by-step explanation:

The diver went down 3 feet below surface so that means negative when you see key words like went "below" or "down" surface level or something it means negative it's getting negative if you see the opposite it's positive.

In this case the diver went down 3 feet so -3 and then it says the diver went down an additional 2 feet so add and additional -2 to the -3 that would be -5 because 3 + 2= 5 it would be kind off the be same for negative

Answer:

8

Step-by-step explanation:

ok?

Answer:

Sparkle wands:  NO

Fairy wands:  YES

Glass wands:  NO

Step-by-step explanation:

To find the price per glitter wand, you have to divide the price of the wands by the amount of wands you have.

$50/8 = $6.25

Divide the price of the wands by the amount you get.

Sparkle wands:  $20/4 = $5

Fairy wands:  $37.50/6 = $6.25

Glass wands:  $65/10 = $6.50

The sparkle wands and the glass wands do not have the same price per wand as glitter wands.

The fairy wands have the same price per wand as glitter wands.

Answer:

Glow wands = no

Fairy Wands= yes

Sparkle Wands = No

Step-by-step explanation:

Khanacademy

Trust

Answer:

B, A, D, C

Step-by-step explanation:

Covert all units into grams.

540 g = 540 g

180,000 mg = 180g

0.8 tonnes = 800000 g

2.3 kg = 2300 g

Arrange in ascending order.

180,000 mg, 540 g, 2.3 kg, 0.8 tonnes

The correct formula for finding the present value of an investment is given by option D) PV = FV x 1/(1 + r)^n.

The present value (PV) of an investment is the current value of future cash flows discounted at a specified rate. The formula for calculating the present value takes into account the future value (FV) of the investment, the interest rate (r), and the number of periods (n).

Option D) PV = FV x 1/(1 + r)^n represents the correct formula for finding the present value. It incorporates the concept of discounting future cash flows by dividing the future value by (1 + r)^n. This adjustment accounts for the time value of money, where the value of money decreases over time.

In contrast, options A), B), and C) do not accurately represent the present value formula and may lead to incorrect calculations.

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Answer:

25%

Step-by-step explanation:

\(\frac{15}{60}\)÷3= \(\frac{5}{20}\)= \(\frac{1}{4}\)= 25%

The distance between X and Y is the difference between the longitude of X and the longitude of Y, plus the radius of the Earth is 6400 km.

Longitude of X = 114 degrees

Longitude of Y = 118 degrees

Difference = 118 degrees - 114 degrees = 4 degrees

Radius of the Earth = 6400 km

Distance between X and Y = 4 degrees + 6400 km = 6404 km

Round the distance to the nearest 100 km.

6404 km = 6400 km (rounded to the nearest 100 km)

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The equation of the line shown in the given graph is y = x/2 + 4

From the question, we are to write the equation for the line shown in the graph

To write the equation of the line we will use the two points given on the line, (-2, 3) and (2, 5)

Using the formula,

(y - y₁) / (x - x₁) = (y₂ - y₁) / (x₂ - x₁)

Then,

The equation becomes

(y - 3) / (x - (-2)) = (5 - 3) / (2 - (-2))

(y - 3) / (x + 2) = (5 - 3) / (2 + 2)

(y - 3) / (x + 2) = 2 / 4

(y - 3) / (x + 2) = 1/2

Cross multiplication

2(y - 3) = 1(x + 2)

2y - 6 = x + 2

2y = x + 2 + 6

2y = x + 8

Divide through by 2

y = x/2 + 4

Hence,

The equation is y = x/2 + 4

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Answer:

nth term = the previous number times 4(x-1)

Step-by-step explanation:

As you see the first tower has 1 then it is 5 for the next tower and then it is 13 for the next tower and then 25. Well this means that as you see, the expressions adds 4 to the previous 4 and then adds to the tower. Let me show you how it works.

Tower 1: 1

Tower 2: 1 + 4 = 5

tower 3 : 5 + 8 = 13

tower 4: 13 + 12 = 25

tower 5: 25 +16 = 41

Answer:

Angle B: 28 degrees

Side a: 27.6

Step-by-step explanation:

Angle B:

180-112-40=28

Side a:

sin 28/14 = sin 112/a

a = sin 112(14)/sin 28

a = 27.6

Answer:

Kiera has a lower ratio of raisins to nuts. (2:5)

Step-by-step explanation:

To find this, you would have to make the number of nuts the same in each to accurately compare them.

It starts with Kiera's 2 cups of raisins and 5 cups of nuts. So it will be 2:5 (raisins first then nuts.)

Desmond will be 3:6 (have to make it the same order, raisins and then nuts.)

So I multiplied both the 2 and the 5 in 2:5 by 6 first.

Then multiply both the 3 and 6 in 3:6 by 5 to make the number of nuts the same in both.

So Kiera will have 12:30 and Desmond will have 15:30.

Then you can conclude that Kiera has the lower ratio.

Using linear function to solve this problem, for every 1 gallon of gas, Francisco travelled 27.9 miles

A linear function is a function that represents a straight line on the coordinate plane. For example, y = 3x - 2 represents a straight line on a coordinate plane and hence it represents a linear function. Since y can be replaced with f(x), this function can be written as f(x) = 3x - 2. A linear function is of the form f(x) = mx + b where 'm' and 'b' are real numbers. Isn't it looking like the slope-intercept form of a line which is expressed as y = mx + b? Yes, this is because a linear function represents a line, i.e., its graph is a line. where m is slope of the line and b is the y - intercept

We can use the data given in writing out our equation

390.6 = 14x

If 14 gallons = 390.6 miles

 1 gallon = x miles

x = 390.6 / 14

x = 27.9 miles

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Answer:

Step-by-step explanation:

Answer:

- 2/5

Step-by-step explanation:

Step 1:

( 4/5 - 7/5 ) + 1/5

Step 2:

- 3/5 + 1/5

Answer:

- 2/5

Hope This Helps :)