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Setler [38]
3 years ago
10

X^2 + 8x + 7 = 0

Mathematics
1 answer:
dsp733 years ago
7 0

Answer:

x - intercepts: -1, -7

Solutions: [is the x-intercepts] -1,-7

Factors: (x+1)(x+7)

Vertex: -4, -9

Axis of symmetry: x = -4

Step-by-step explanation:

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Why does (-4 1/2)^2 = 20.25? Thank you please hurry!
AnnZ [28]

Answer:

See below.

Step-by-step explanation:

Squaring a number means to multiply the number by itself.

For example, 3^2 means 3 * 3.

8^2 means 8 * 8.

(-6)^2 means (-6) * (-6).

In each case above, you see that the number that is squared is multiplied by itself.

In this case, (-4.5)^2, squaring the number -4.5, means multiply the number -4.5 by the number -4.5

(-4.5)^2 = (-4.5) * (-4.5)

Now we need to actually multiply -4.5 by -4.5

When you multiply a negative number by a negative number, the result is positive, so the product of -4.5 and -4.5 is a positive number. To find that number, you multiply 4.5 by 4.5

4.5 * 4.5 = 20.25

Therefore, (-4.5)^2 = 20.25

4 0
4 years ago
What's the unit rate of 52songs on 4cd's?
Brrunno [24]
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5 0
3 years ago
Which is an example of an algebraic expression?
azamat
An algebraic expression doesnt have an equals sign or an inequality sign. 

So,

A is an expression
B is an inequality
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5 0
4 years ago
Rearrange the formula V = 2πr/T for r.
Zielflug [23.3K]
V =\dfrac{2\pi r}{T}\quad|\cdot T\\\\\\TV=2\pi r\quad|:2\pi\\\\\\\boxed{\dfrac{TV}{2\pi}=r}

Answer D.
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4 years ago
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Answer:

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