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Aloiza [94]
3 years ago
7

Solve for the value of y. 13 points

Mathematics
2 answers:
a_sh-v [17]3 years ago
4 0

Answer:

y = 30

Step-by-step explanation:

2y + 1 +29 = 90

2y + 30 = 90

2y = 90 - 30

2y = 60

y = 30

iogann1982 [59]3 years ago
3 0

Answer:

y=30

Step-by-step explanation:

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Write down the quadratic equation whose roots are $x = -7$ and $x = 1,$ and the coefficient of $x^2$ is 1. Enter your answer in
pav-90 [236]
<h2>Steps:</h2>

So firstly, since we know that the coefficient of x² is 1, this means that this is our base equation:

y = x² + bx + c

Now, since we know that the roots are -7 and 1, set y = 0 and set x = -7 and 1 and simplify:

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Now with this, we can set up a system of equations to solve for b and c. For this, I will be using the elimination method. For this, subtract the 2 equations:

\begin{alignedat}{2}-49&=-7b+c\\-(-1&=b+c)\\-48&=-8b\end{alignedat}

Now that the c variable has been eliminated we can solve for b. For this, divide both sides by -8 and your first part of your answer is b = 6.

Now that we know the value of b, plug it into either equation to solve for c:

-49=-7(6)+c\\-49=-42+c\\-7=c\\\\-1=6+c\\-7=c

<h2>Answer:</h2>

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3 years ago
I need to find the means to MAD ratio for these two sets of numbers.....
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adell [148]

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4 0
3 years ago
14
Arada [10]

Answer:

Gerrard

Step-by-step explanation:

Let the size of each poster be x

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