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3 years ago

I tried, but can't get any further

Mathematics

1 answer:

san4es73 [151]3 years ago

8 0

The next step would be to recognize your expression as a difference of squares:

$64z^2-1=(8z)^2-1^2$

We have a neat rule for factorization of a difference of squares:

$a^2-b^2=(a-b)(a+b)$

So you would have

$64z^2-1=(8z-1)(8z+1)$

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Tanzania [10]

Answer:

$45.50

Step-by-step explanation:

1. $65.00 ÷ 100 = 0.65

2. 0.65 x 30 = $19.50

3. $65.00 - $19.50 = $45.50

4 0

2 years ago

Solve the two-step equation. -9x 0. 4 = 4 Which operation must be performed to move all the constants to the right side of the e

AlekseyPX

The steps needed to solve the given equation is required.

Adding the opposite value of the constant to both sides.

Divide both sides by the coefficient of the variable.

The solution to the equation is

The given equation is

In order to solve this we first move constants to the side opposite of the variable.

This is done by adding the opposite value of the constant to both sides.

Here is the constant so we add to both sides.

Now, we divide both sides by the coefficient of the variable.

The solution to the equation is

3 0

2 years ago

Need help asap this is really important

nadya68 [22]

Answer:

y = $\frac{4}{3}$ $x$ $-7$

Step-by-step explanation:

Use the points (9, 5) and (6, 1) to identify the slope of the graph

$m$ = $\frac{y^2-y^1}{x^2-x^1}$

m = $\frac{1-5}{6-9}$

m = $\frac{-4}{-3}$

m = $\frac{4}{3}$

The y-intercept is -7 because -7 touches y axis causing it to be the y-intercept

5 0

2 years ago

PLS HELP ME 5x+3=7x-1

TiliK225 [7]

Answer:

Hello! the answer is X=2

Step-by-step explanation:

8 0

2 years ago

Read 2 more answers

I need help, please and thank you. I know that you have to multiply the diameter by 2 to find the radius, but with the 9 pi, it

andrew11 [14]

Answer:

r=6

Step-by-step explanation:

The area of a circle is given by πr². Note that this uses the radius, not the diameter.

Now, one quarter of this area (ABC) is given to be 9π.

So apparently:

$\frac14 \pi r^2 = 9\pi$

If you solve this:

$\frac14 r^2 = 9$ (divide both sides by π)

$r^2 = 9\cdot4$ (multiply both sides by 4)

r = √36 = 6

so the radius is 6.

4 0

3 years ago