2 years ago

1) What is the value of the expression 3 4 + 15.45 - 19.75 + 7.87?

Mathematics

1 answer:

Delvig [45]2 years ago

6 0

Answer:

37.57

Step-by-step explanation:

34 + 15.45 - 19.75 + 7.87

34 + 15.45 = 49.45

49.45 - 19.75 + 7.87

49.45 + 7.87 = 57.32

57.32 - 19.75 = 37.57

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Answer:

Step-by-step explanation:

4/Squareof 2

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What is the average rate of change of the function over the interval x = 0 to x = 8?

salantis [7]

Ans: The average rate of change of function = $\frac{1}{102}$ (in fraction)

Explanation:
The average rate of change of function = $\frac{f(b) - f(a)}{b - a}$

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a = 0 (x's lower bound)

$f(b) = f(8) = \frac{2*8-2}{5*8-6} = \frac{7}{17} \\ f(a) = f(0) = \frac{2*0-2}{5*0-6} = \frac{1}{3} \\ \frac{f(b) - f(a)}{b-a} = \frac{ \frac{7}{17} - \frac{1}{3}}{8} = \frac{1}{102}$

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3 years ago

Three more than twice the sum of a number and half the number equals 105. Which equation models this relationship?

Umnica [9.8K]

Answer:

The correct answer is A or 2(x+1/2x)=105

Step-by-step explanation:

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3 years ago

Write -6.1 as a mixed number in simplest form.

butalik [34]

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3 years ago

143=7+8(3-7x) solve and justify

Llana [10]

Justify means plug answer in and verify

so distribute 8(3-7x)=24-56x

143=7+24-56x
143=31-56x
minus 31 both sides
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divide both sides by -56
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justify

plug it back
143=7+8(3-7x)
143=7+8(3-7(-2))
143=7+8(3-(-14))
143=7+8(3+14)
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143=7+136
143=143

true

x=-2

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