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ella [17]
3 years ago
9

7th grade math, 15 points

Mathematics
2 answers:
kolbaska11 [484]3 years ago
7 0

Answer:

1. $5.61

Step-by-step explanation:

if $22 = $1.87 tax

then: $1 would be $0.085

so 66 x 0.086 = 5.61

$66 = $5.61

Talja [164]3 years ago
6 0

Answer:

1. $5.61

Step-by-step explanation:

if $22 = $1.87 tax

then: $1 would be $0.085

so 66 x 0.086 = 5.61

$66 = $5.61

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The sum of three consecutive integers is 189. What are the integers?
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Answer: 62+63+64

Step-by-step explanation:

Divide 189 by 2. That gives you 63. Then go for a number 1 above it and 1 below it.

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Factor completely 3x^2 +2x +1
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It cannot be factored, so it is prime.
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What is f(x) = 7x2 + 42x written in vertex form?
amid [387]

Answer:

\boxed{\boxed{y = 7(x+3)^2-63}}

Step-by-step explanation:

The general vertex form of parabola is,

y=a(x-h)+k

where,

(h, k) is the vertex of the parabola.

The given function is,

\Rightarrow f(x) = 7x^2 + 42x

\Rightarrow y = 7x^2 + 42x

\Rightarrow y = 7(x^2 + 6x)

\Rightarrow y = 7(x^2 + 2\cdot x\cdot 3)

\Rightarrow y = 7(x^2 + 2\cdot x\cdot 3+3^3-3^2)

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\Rightarrow y = 7(x+3)^2-7\cdot 9

\Rightarrow y = 7(x+3)^2-63

This is vertex form the given function.

7 0
3 years ago
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Evaluate a2b2c2 for a = 2, b = 3, and c = 4.
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Answer:

(-2, 4)

Step-by-step explanation:

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The reason the x-value does not change is because you are reflecting over the x-axis, making the point go up or down. That will change the y-value but the x-value only changes if you move to the left or the right. In this case, you can see that the point's x-value is -2, so that will not change. It's current y-value however is -4. When reflecting over an axis, the number that is changing (in this case the y-value) will just be flipped from positive to negative, or vise versa. In this case, -4 will be reflected to be 4, making point C reflected over the x-axis (-2, 4).

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3 years ago
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