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2 years ago

Explain how you know which coins could be used to show 0.77 of a dollar

Mathematics

1 answer:

Illusion [34]2 years ago

8 0

you can use 3 quarters and 2 pennies

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Evaluate 3x^2- 9 when x=-2

murzikaleks [220]

Answer:

Step-by-step explanation:

We know x = -2, so we can substitute -2 in for x

3x^2- 9

3*-2^2-9

Solve the exponent first (PEMDAS)

3*4-9

Multiply next

12-9

Subtract

6 0

2 years ago

Read 2 more answers

Precal. Find the sum. Show every step you took to get to your answer. I will give brainliest if you are correct and show all wor

Ymorist [56]

Answer:

I think your forgot to add some parts of this question, because you can't do anything with this except simplify it down a little maybe. But, I will provide the simplified version of this.

$\frac{x-4}{x^2-2x}+\frac{4}{x^2-4}$

= $\frac{x-4}{x\left(x-2\right)}+\frac{4}{x^2-4}$

= $\frac{x-4}{x\left(x-2\right)}+\frac{4}{\left(x+2\right)\left(x-2\right)}$

= $\frac{\left(x-4\right)\left(x+2\right)}{x\left(x-2\right)\left(x+2\right)}+\frac{4x}{\left(x+2\right)\left(x-2\right)x}$

= $\frac{\left(x-4\right)\left(x+2\right)+4x}{x\left(x-2\right)\left(x+2\right)}$

= $\frac{x+4}{x\left(x+2\right)}$

Step-by-step explanation:

Hope this helped!

8 0

2 years ago

Find x in the triangles

Degger [83]

Tan 32=9/x
x=14.4

cos29=x/7
x=6.12

4 0

2 years ago

If p(x) = x2 – 1 and 4(x) = 5(x-1), which expression is equivalent to (p -9)(x)?

jenyasd209 [6]

Answer:

5 times 5 24

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

Solve the equation for the indicated variable. Please help ASAP!!!!! :(<br> A=(730x)/(d^2) for x

zvonat [6]

First let's get rid of the $d^2$ in the denominator of the fraction on the right side of the equation. This will help to get only $x$ and a coefficient on one side of the equation:

$A = \dfrac{730x}{d^2}$

$d^2A = 730x$

Now, simply divide by 730 to find $x$ :

$d^2A = 730x$

$\boxed{\dfrac{d^2A}{730} = x}$

3 0

2 years ago