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3 years ago

PLS HELP! If f(x) = -9x + 12, and f(x) = -6, find x.

Mathematics

1 answer:

aivan3 [116]3 years ago

5 0

Answer:

Step-by-step explanation:

You can rewrite thosee two equations as -9x+12=-6, because f(x)=f(x)

Now isolate x

-9x+12=-6

-9x+12-12=-6-12 (subtract 12, subtraction property of equality)

-9x=-6-12

-9x=-18 (simplify)

-9x/-9=-18/-9 (divide by 9, division property of equality)

x=2

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PLZ ANSWER 75 POINTS FAST!!!!!!!!!!!!!!!!

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Answer:

6 inches

Step-by-step explanation:

The volume of a triangular pyramid can be found using

v=1/3bh

where b is the area of the base, and h is the height

We know the volume is 12, so let's find the area of the base

The area of a triangle can be found using:

a=bh/2

We know the base is 4, and the the height is 3, so we can substitute them in

a=4*3/2

a=12/2

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Now, we can solve for the height

v=1/3bh

Substitute 12 in for v, and 6 in for b

12=1/3(6h)

Multiply both sides by 3

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36=6h

Divide both sides by 6

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Mateo reproducira una foto que mide 5 cm por lado a una escala de 3/4

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the question in English

Mateo will reproduce a photo measuring 5 cm per side on a scale of 3/4

How much will the square side of the copy measure?

Will the size of the copy be larger or smaller than the original?

we know that

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Let

x----------> the original length side

y--------> the copy length side

$y=\frac{3}{4}*x$

we have that

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substitute the values

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<u>the answer Part a) is </u>

the length side of the copy measure is $3.75\ cm$

Part b)

we know that

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the size of the copy is------> $3.75*3.75=14.06\ cm^{2}$

$14.06\ cm^{2} < 25\ cm^{2}$

therefore

<u>the answer part b) is</u>

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