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scoray [572]
3 years ago
13

What is the answer to (8x+5)^2=63? I've been stuck on this problem for about 10 minutes now.

Mathematics
1 answer:
Liula [17]3 years ago
8 0
When the equation is squared, you have to foil (8x+5), so it becomes 
(8x+5)(8x+5)=63 

then you use the distributive property, so it become 64x^2 +40x +40x +25, and you simplify that into 64x^2+80x+25=63

next you subtract 63 from the left, sso it becomes 64x^2+80x-38=0 
then you use the quadratic formula -b+/- (root b^2-4ac )/2a to solve for the zeros or x-values
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Are 12x^2y^3z and -45zy^3x2 like terms? explain why or why not.
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Here in the second term I am considering 2 as power of x .

So rewriting both the terms here:

First term: 12x²y³z

Second term: -45zy³x²

Let us now find out whether they are like terms or not.

"Like terms" are terms whose variables (and their exponents such as the 2 in x²) are the same.

In the given two terms let us find exponents of each variable and compare them for both terms.

z : first and second term both have exponent 1

x: first and second term both have exponent 2

y: first and second term both have exponent 3

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3 years ago
A roller coaster’s height is given by the equation h = –.025t2 + 4t + 50, where t represents the time in seconds. How long will
Semenov [28]

It will take the roller coaster 171.652 seconds to pass over the hill and reach ground level

<h3>How to determine the time to hit the ground?</h3>

The function is given as:

h = –.025t^2 + 4t + 50

Set h = 0.

So, we have:

–.025t^2 + 4t + 50 = 0

Using a graphing calculator, we have:

t = -11.652 and t = 171.652

Time cannot be negative.

So, we have:

t = 171.652

Hence, it will take the roller coaster 171.652 seconds to pass over the hill and reach ground level

Read more about quadratic functions at:

brainly.com/question/27958964

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