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3 years ago

Rewrite 2 4/7 as an improper fraction.

Mathematics

2 answers:

Elena L [17]3 years ago

8 0

Answer:

$\frac{18}{7}$

Step-by-step explanation:

$2\frac{4}{7}$

→ Multiply 7 by 2 then add 4

7 × 2 = 14 + 4 = 18 ⇔ Numerator

7 ⇔ Denominator

nordsb [41]3 years ago

5 0

Answer: 18/7

Explanation: To write a mixed number as an improper fraction, first multiply

the denominator times the whole number, then add the numerator.

So here, we multiply the denominator, 7, times the

whole number, 2, then we add the numerator, 4.

So we have (7 × 2) + 4 or 14 + 4 which is 18.

Finally, we put our new number over our

old denominator and we have our answer, 18/7.

So 2 and 4/7 can be rewritten as the improper fraction 18/7.

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3 years ago

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What is the answer to -3+p=?

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3 years ago

Read 2 more answers

A spotlight on the ground shines on a wall 12 m away. If a man 2 m tall walks along the x-axis from the spotlight toward the bui

Sedbober [7]

Answer:

0.675 m/s

Step-by-step explanation:

Let height of shadow= y,CD=x

Height of man=2 m

Speed of man= $\frac{dx}{dt}=1. 8 m/s$

$\triangle ABD\sim\triangle ECD$

Therefore, $\frac{AB}{EC}=\frac{BD}{CD}$

$\frac{y}{2}=\frac{12}{x}$

$xy=24$

Differentiate w.r.t t

$x\frac{dy}{dt}+y\frac{dx}{dt}=0$

$x\frac{dy}{dt}=-y\frac{dx}{dt}$

$\frac{dy}{dt}=-\frac{y}{x}\frac{dx}{dt}$

When the man is 4 m from the building

Then, we have x=12-4=8 m

$\frac{dx}{dt}=1.8 m/s$

Substitute the values in above equation then, we get

$8y=24$

$y=\frac{24}{8}=3$

Substitute the values then we get

$\frac{dy}{dt}=-\frac{3}{8}\times 1.8=-0.675 m/s$

Hence, the length of his shadow on the building decreasing at the rate 0.675 m/s.

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3 years ago

Need help on A and B thank you

lesya [120]

A 78 lollll I need points so I’m guessing

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3 years ago