4 years ago

Greg is riding his bicycle. He rides

Mathematics

1 answer:

Vsevolod [243]4 years ago

4 0

6.4km/hr or about 4 mph

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Simplify: (4 /5 + 6/ 25 ) X (8/ 9 + −8 /7 )

Westkost [7]

Answer: -416/1575

Step-by-step explanation:

$\frac{4}{5}=\frac{20}{25} \implies \frac{4}{5}+\frac{6}{25}=\frac{26}{25}\\$

$\frac{8}{9}=\frac{56}{63}\\\\-\frac{8}{7}=-\frac{72}{63}\\\\\implies \frac{8}{9}-\frac{8}{7}=-\frac{16}{63}$

$\frac{26}{25} \times -\frac{16}{63}=-\frac{416}{1575}$

6 0

2 years ago

The number a is smaller than the number b by 1/5 of b. By what part of a is b bigger than a?

Ira Lisetskai [31]

Answer:

The number b is bigger than the number a by $\dfrac{1}{4}$ of a.

Step-by-step explanation:

1. If the number a is smaller than the number b by 1/5 of b, then

$a+\dfrac{1}{5}b=b.$

Thus,

$a=b-\dfrac{1}{5}b=\dfrac{4}{5}b,\\ \\b=\dfrac{5}{4}a.$

2. Consider the expression $b=\dfrac{5}{4}a:$

$b=\dfrac{5}{4}a=\dfrac{4}{4}a+\dfrac{1}{4}a=a+\dfrac{1}{4}a.$

This gives you that the number b is bigger than the number a by $\dfrac{1}{4}$ of a.

7 0

3 years ago

The area of the surface of a circular pond is needed. A measure about the pond gives a circumference of about 47 feet. Find the

Whitepunk [10]

Answer:

55.95 ft²

Step-by-step explanation:

Circumference formula: C = 2πr => r = C / (2π)

Area formula: A = πr²

Substituting C / (2π) for r in the above equation, we get:

C 47 ft

A = π( ----------- )² = π ( -------------- )²

2π (2π)

or ...

π(47 ft)² 2209 ft²

A = ---------------------- = -------------------- = 55.95 ft²

4π² 4(3.14159)²

3 0

3 years ago

Which of the following inequalities would have a solid line when graphed? Select all that apply.

Ilia_Sergeevich [38]

Answer:

A. y>x−9y is greater than x minus 9

8 0

3 years ago

Simple question yet don't know.

34kurt

Simple not rlky but I think it's the second to last one

4 0

3 years ago

Read 2 more answers