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Natasha2012 [34]
3 years ago
8

Three times a number increased by 7 is 100. Find the number.

Mathematics
2 answers:
velikii [3]3 years ago
7 0

Answer:

31

Step-by-step explanation:

100-7= 93

93÷3=31

4vir4ik [10]3 years ago
4 0

Answer:

the number is 31

Step-by-step explanation:

the number is the variable x

3 times the number is 3x

increased by 7 is +7

is 100 is =100

3x +7 =100

subtract 7 from both sides

3x =93

divide by 3 on both sides

x = 31

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A windshield wiper is 50 cm long. In one sweep it turns through an angle of 115°. Calculate the distance (length) it covers in o
sergeinik [125]

Answer:

The distance in one sweep is 100 cm approximately

Step-by-step explanation:

Here, we want to calculate the distance the wiper covers in one sweep

Mathematically;

we have a structure like an arc of a circle. It is the length of this arc we want to calculate.

The formula for the length of an arc is;

theta/360 * 2 * pi * r

r is the radius which in this case is 50 cm

We have ;

115/360 * 2 * 3.1412 * 50 = 100 cm approximately

4 0
3 years ago
4. Which of the following is equal to (9 x 1) + (5 x 1/10) + (1 x 1/100)?
Stolb23 [73]

Answer:

c

Step-by-step explanation:

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5 0
3 years ago
HELP ME PLEASE
Mashutka [201]

Answer:

9 + \frac{n}{3} - 6 = 7

Step-by-step explanation:

Given

9 + \frac{n}{3} - 6

Required

Evaluate when n = 12

Substitute 12 for n in 9 + \frac{n}{3} - 6

9 + \frac{n}{3} - 6 = 9 + \frac{12}{3} - 6

Simplify the fraction

9 + \frac{n}{3} - 6 = 9 + 4 - 6

9 + \frac{n}{3} - 6 = 7

4 0
3 years ago
Can someone help me with a b and c please
abruzzese [7]

Answer:

c.in this 2014,396.12million pets were owned

3 0
3 years ago
Round 86.74 to the nearest whole
zlopas [31]

Answer:

87

Step-by-step explanation:

7 0
3 years ago
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