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ivanzaharov [21]

3 years ago

8

Kaitlyn is sharpening a pencil that is 19 cm. Each time she sharpens it goes down 2.5 cm. If she sharpens her pencil 4 times. Ho

w many centimeters of pencil does she have left?

1 answer:

Natasha2012 [34]3 years ago

7 0

Answer:

9 cm

Step-by-step explanation:

2.5x4=10

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matrenka [14]

Answer:

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3 years ago

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Evaluate the indicated function for f(x)=x^2-7 and g(x) =x-2

enyata [817]

Answer:

f(g(x))=(x-2)^2 - 7

(x-2)(x-2) - 7

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x^2-9

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Step-by-step explanation:

to solve for f(x), replace x with the g(x).
since we don't multiply a bracket with the negative or the positive signs to the
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add like-terms

to find g(x), replace x with the f(x).
add like-terms
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3 years ago

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Dima020 [189]

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3 years ago

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What are the solutions to the quadratic equation x^2-16=0

maks197457 [2]

Good evening.

This is a incomplete quadratic equation, because it does not have the term bx. Therefore, we can solve this faster with the following strategy:

$\mathsf{x^2 - 16 = 0}$

Add 16 to both sides:

$\mathsf{x^2 - 16 + 16 = 0 + 16}\\ \\ \mathsf{x^2 = 16}$

Take the square root:

$\mathsf{\sqrt {x^2} = \pm\sqrt{16}}\\ \\ \mathsf{\boxed{\mathsf{x = \pm4} }}$

Therefore:

$\boxed{\boxed{\mathsf{S=\{-4, \ +4\}}}}$

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4 years ago

The line represented by the equation 2y - 3x = 4 has a slope of.....

S_A_V [24]

2y - 3x = 4
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y = 3/2*x + 2

y = kx + b ==>

k = 3/2 = 1,5

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3 years ago