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nasty-shy [4]
3 years ago
8

Can someone please help me thank you

Mathematics
1 answer:
butalik [34]3 years ago
8 0

Answer:

Neither of the students are correct.

Step-by-step explanation:

Sarah:

P = 3x + x +7 + 3x + x +7 ..... this first step is correct

    = 6x + 14 .... this step is incorrect, Sarah forgot to add the other 2 xs

John:

P = 2(x + 7) + 2(3x)

  =  2x + 7 + 6x .... this step is incorrect, John forgot to distribute the 2 to the 7

  =  8x + 7 .... incorrect because of the previous step

The answer should've been 8x + 14.

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In centimeters, what is the unknown length in this right triangle?<br> 61 cm<br> 60 cm
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Answer:11

Step-by-step explanation:

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What is the slope of the line?
Dimas [21]

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-1/2

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What is the area of a rectangle with side lengths of 5/12 ft and 2/3ft
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2 years ago
X^2+ 17x+91=0<br> Help please!!
Morgarella [4.7K]

Answer:

x^2+17x+91=0

a = 1; b = 17; c = +91;

Δ = b2-4ac

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Step-by-step explanation:

6 0
3 years ago
Can someone please help me with this question
cricket20 [7]

Answer:

  B, E

Step-by-step explanation:

It can be helpful to factor the first two terms:

  f(x) = x^2(x -7) +36

This can make it easier to evaluate the function for different values of x.

The answer choices suggest you need to know whether f(5) and f(-14) match the values given here.

  f(5) = 5^2(5 -7) +36 = -50 +36 = -14 . . . . matches choice B (and E)

  f(-14) = (-14)^2(-14-7) +36 = -21(196) +36 . . . . <em>does not match</em> choice A (or D)

__

The one remaining answer choice we need to consider is C. If we look at f(0) for this equation, we find it is (-5)(-10) +14 = 64, which <em>does not match</em> f(0) = 36 for the function given in the problem statement.

The only true answer choices are B and E.

_____

The remainder theorem tells you that f(a) = the remainder from f(x)/(x -a).

8 0
4 years ago
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