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3 years ago

Read The question and give Me The answers for number 18

Mathematics

1 answer:

djverab [1.8K]3 years ago

3 0

Answer:

F(x) = 2.15(2x^2-4x-6)

x=9

F(x)= 2.15[2(9)^2 - 4(9) - 6

F(x)=258

$258

Your answer is B.

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Which expression is equivalent to (21/2 x 2 3/4)^2

sasho [114]

ANSWER

$(2 \frac{1}{2} \times 2 \frac{3}{4} ) ^{2} = 47 \frac{17}{64}$

EXPLANATION

To find the expression that is equivalent to
$(2 \frac{1}{2} \times 2 \frac{3}{4} ) ^{2}$

we need to simplify it.

We convert the mixed numbers to improper fraction as follows.

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This will give us,

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$(2 \frac{1}{2} \times 2 \frac{3}{4} ) ^{2} = ( \frac{5}{2} \times \frac{11}{4} )^{2}$

We multiply the expression in the parenthesis on the right hand side to obtain,

$(2 \frac{1}{2} \times 2 \frac{3}{4} ) ^{2} = ( \frac{55}{8} )^{2}$

We share the exponent for the numerator and the denominator separately.

$(2 \frac{1}{2} \times 2 \frac{3}{4} ) ^{2} = \frac{ {55}^{2} }{ {8}^{2} }$

This simplifies to,

$(2 \frac{1}{2} \times 2 \frac{3}{4} ) ^{2} = \frac{ {3025} }{ {64}}$

We write the final answer as a mixed number to obtain,

$(2 \frac{1}{2} \times 2 \frac{3}{4} ) ^{2} = 47 \frac{17}{64}$

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