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4 years ago

Pleaae help is for study

Mathematics

1 answer:

cupoosta [38]4 years ago

4 0

I think it's B. Because he spends his 300 dollars so he would have to subtract it will all the money he has spent.

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Are my formulas for 9 and 10 correct? i feel like something may be off

sukhopar [10]

Answer:

by my degree in math and other things this is correct.

3 0

4 years ago

Simplifying radicals! Please help me & Show WORK

andriy [413]

Answer:

Solving the radical $4\sqrt{2}(-4\sqrt{15}+3\sqrt{18})$ we get $\mathbf{-16\sqrt{30}+72}$

Step-by-step explanation:

We need to simplify the radical: $4\sqrt{2}(-4\sqrt{15}+3\sqrt{18})$

Prime factors of 18 are: 2x3x3

Replacing $\sqrt{18}$ with its factors

$4\sqrt{2}(-4\sqrt{15}+3\sqrt{18})\\=4\sqrt{2}(-4\sqrt{15}+3\sqrt{2\times3\times3})\\=4\sqrt{2}(-4\sqrt{15}+3\sqrt{2\times3^2})$

We know that $\sqrt{3^2}=3$

$=4\sqrt{2}(-4\sqrt{15}+3\times3\sqrt{2})\\=4\sqrt{2}(-4\sqrt{15}+9\sqrt{2})$

Multiplying $4\sqrt{2}$ with terms inside the bracket

$=4\sqrt{2}(-4\sqrt{15})+4\sqrt{2}( 9\sqrt{2}))\\=-16\sqrt{2}\sqrt{15}+36\sqrt{2} \sqrt{2}$

We know that $\sqrt{2} \sqrt{2}=2$

$=-16\sqrt{2*15}+36(2)\\=-16\sqrt{30}+72$

So, solving the radical $4\sqrt{2}(-4\sqrt{15}+3\sqrt{18})$ we get $\mathbf{-16\sqrt{30}+72}$

3 0

3 years ago

What is an equation of the line that passes through the points (-8, 4) and (-8, 8)?

Ann [662]

Answer:

x = -8

Step-by-step explanation:

The line is a vertical line with x-intercept of -8

6 0

3 years ago

What is 5 1/3 - 2 2/3?

Gre4nikov [31]

The answer would be 2 2/3

7 0

4 years ago

Read 2 more answers

Solve for k <br> 7k+2m = kr + 4m + 3

professor190 [17]

Answer:

$\large\boxed{k=\dfrac{2m+3}{7-r}\ \text{for}\ r\neq7}$

Step-by-step explanation:

$7k+2m=kr+4m+3\qquad\text{subtract}\ 2m\ \text{from both sides}\\\\7k+2m-2m=kr+4m-2m+3\\\\7k=kr+2m+3\qquad\text{subtract}\ kr\ \text{from both sides}\\\\7k-kr=kr-kr+2m+3\\\\7k-kr=2m+3\qquad\text{distribute}\\\\k(7-r)=2m+3\qquad\text{divide both sides by}\ (7-r)\neq0\\\\k=\dfrac{2m+3}{7-r}$

6 0

3 years ago