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snow_tiger [21]
3 years ago
13

Regras dos sinais e números racionais resuma

Mathematics
1 answer:
anygoal [31]3 years ago
7 0

Answer:

Regras: - Ao adicionar dois inteiros positivos, você receberá uma soma positiva. ... -Ao adicionar um inteiro que seja negativo e um que seja positivo, a soma dependerá de quão grande é o valor absoluto para os dois inteiros para saber se a resposta será positiva ou negativa.

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You answer 12 emails in 15 minutes. How many emails can you answer in 2 hours?
Marysya12 [62]

Answer:

96

Step-by-step explanation:

you divide 60 min by 15 to get 4 then u multiply 12 × 4 =48 then multiply 48 × 2=96

8 0
3 years ago
Pls help me with this
Yanka [14]

Answer:

12

Step-by-step explanation:

f(-7) = 5-(-7)=5+7=12

4 0
3 years ago
Read 2 more answers
A grapefruit has a peel that is 1cm thick and a total diameter of 12cm. What percentage of volume of the grapefruit is the peel?
ira [324]

Answer:

0.3056 or 30.56%

Step-by-step explanation:

The volume of the grapefruit with the peel is:

V_p=\frac{4 \pi (d/2)^2}{3}\\V_p=\frac{4 \pi (12/2)^2}{3}\\V_p=48 \pi

When removing the peel, the grapefruit diameter becomes 10 cm (take out 1 cm of peel from each side). The volume of the grapefruit without the peel is:

V_n=\frac{4 \pi (d/2)^2}{3}\\V_n=\frac{4 \pi (10/2)^2}{3}\\V_n=33.333 \pi

The percentage of the volume correspondent to the peel is given by the difference between both volumes, divided by the total volume:

\%P = \frac{48\pi - 33.333\pi}{48\pi}\\ \%P =0.3056 = 30.56\%

30.56% of volume of the grapefruit is the peel.

4 0
4 years ago
Find the slope of the line that passes through (-68, 47) and (-66, 33).
ZanzabumX [31]

Answer:

  • - 7

Step-by-step explanation:

<u>The slope formula:</u>

  • m=(y_2-y_1)/(x_2-x_1)

<u>Substitute the values to get:</u>

  • m=(33-47)/(-66+68)=-14/2=-7
8 0
3 years ago
Read 2 more answers
If the circumference of a circle below is 75 inches what is the length of DE
Evgen [1.6K]
The circumference formula is 2Πr, so simply equal that formula to 75.
2Πr=75
Divide both sides by 2
Πr=37.5
So radius is 37.5/Π.
4 0
4 years ago
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