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3 years ago

Find the equation line through point (-4,15) and (4,-5)

Mathematics

1 answer:

Oduvanchick [21]3 years ago

8 0

Answer highlighted in blue. Hope this helps.

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Multiply 2/7 with its additive inverse

mafiozo [28]

To find the additive inverse, multiply 2/7 by -1.

Answer: -2/7.

Why is the answer -2/7?

When you add 2/7 + (-2/7) the answer will be 0.

This is why -2/7 is the additive inverse.

5 0

4 years ago

PLEASE HELP!!

FinnZ [79.3K]

D. since if you plug in the Pythagorean therom it comes out true and the Pythagorean therom only works on right triangles. also isosceles have 2 side lengths the same.

6 0

3 years ago

Solve cos x + rad 2 = -cos x for over the interval [0, 2pi ]

Kamila [148]

$cos x + \sqrt{2} = -cosx \\ \\ 2 cos x + \sqrt{2} = 0 \\ \\ cos x = -\frac{\sqrt{2}}{2}$

The cosine function is negative in 2nd and 3rd quadrants, So you know that you will have 2 solutions. One between pi/2 and pi, the other between pi and 3pi/2.

Refer to a unit circle to find that
$cos (\frac{3\pi}{4}) = -\frac{\sqrt{2}}{2} \\ \\ cos (\frac{5\pi}{4}) = -\frac{\sqrt{2}}{2}$

Final Answer:
$x = \frac{3\pi}{4}, \frac{5\pi}{4}$

6 0

3 years ago

Solve the equation. Round to the nearest hundredth. Show work.

Burka [1]

Answer:

$x=-0.75$

Step-by-step explanation:

The given equation is

$4^{-5x-7}=6^{2x-1}$

We take logarithm of both sides to base 10.

$\log(4^{-5x-7})=\log(6^{2x-1})$

$(-5x-7)\log(4)=(2x-1)\log(6)$

We expand the brackets to get;

$-5x\log(4)-7\log(4)=2x\log(6)-\log(6)$

Group similar terms;

$-7\log(4)+\log(6)=2x\log(6)+5x\log(4)$

$-7\log(4)+\log(6)=(2\log(6)+5\log(4))x$

$\frac{-7\log(4)+\log(6)}{(2\log(6)+5\log(4))}=x$

$x=-0.752478$

To the nearest hundredth.

$x=-0.75$

3 0

3 years ago

Image Attached, Complete the square. Fill in the number that makes the polynomial a perfect-square quadratic. Will give Brainlie

AnnZ [28]

Answer:

169

Step-by-step explanation:

You should know that the middle number with the x is double the original number not in expanded form. You should also know that in the expanded form, the last number is the square of the original number. So square(26/2) = 169.

7 0

3 years ago

Read 2 more answers