Please help quickly i need to know how to do this as well

Mathematics

1 answer:

VLD [36.1K]3 years ago

6 0

Total the number of tenth graders: 12 + 14 + 8 = 34 total.

Now divide the number of tenth graders who speak Spanish by the total number of tenth graders:

12 / 34 = 0.3529

Multiply the decimal answer by 100 to get the percent:

03529 x 100 = 35.29%

Round to the nearest tenth = 35.3%

The answer is the first choice.

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How to show these 2 problems are inverses

nataly862011 [7]

$\bf \begin{cases}
f(x)=\sqrt[3]{7x-2}\\\\
g(x)=\cfrac{x^3+2}{7}
\end{cases}\\\\
-----------------------------\\\\
now
\\\\
f[\ g(x)\ ]\implies f\left[ \frac{x^3+2}{7} \right]\implies \sqrt[3]{7\left[ \frac{x^3+2}{7} \right]-2}\implies \sqrt[3]{x^3+2-2}
\\\\\\
\sqrt[3]{x^3}\implies x\\\\
-----------------------------\\\\
or
\\\\
g[\ f(x)\ ]\implies g\left[\sqrt[3]{7x-2}\right]\implies \cfrac{\left[\sqrt[3]{7x-2}\right]^3+2}{7}
\\\\\\
\cfrac{7x-2+2}{7}\implies \cfrac{7x}{7}\implies x$

thus f[ g(x) ] = x indeed, or g[ f(x) ] =x, thus they're indeed inverse of each other

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3 years ago

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ki77a [65]

Answer:

Step-by-step explanation:

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The average of Johnny’s two tests is a 92. What must he get on a 3rd test to raise his average to a 94?

zheka24 [161]

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S(t)=sqrt3t+1 at t=2

avanturin [10]

Answer:

s(2) = √7

Step-by-step explanation:

s(2) = √(3[2] + 1) = √7

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Multiple Choice

riadik2000 [5.3K]

The answer is 1954. Letter C is correct
Solution:
If P(x) = <span>165,000
</span>Then
165,000 = 55,000(x - 1945<span>)^(1/2)
x= 1954

to check it, substitute x
</span>165,000 = 55,000(1954 - 1945)^(1/2)
165,000 =165,000

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