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nlexa [21]
2 years ago
12

Add 5 to me. Then divide by 7. If you add 12 and then subtract 7 you get 10. What number am I

Mathematics
2 answers:
Alinara [238K]2 years ago
8 0

Answer:

x = 30/7

Step-by-step explanation:

Unknown number = x

Write an equation

x + 5 ÷ 7 + 12 - 7 = 10

Simplify

x + 5/7 + 12 - 7 = 10

x + 5/7 + 5 = 10

x + 5/7 = 5

x = 30/7

Hope this helps :)

algol [13]2 years ago
4 0

Answer:

30

Step-by-step explanation:

work in reverse:

10+7=17

17-12=5

5×7=35

35-5=30

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2 years ago
A random sample of five Galaxy 8 smartphones is selected from the production line after final assembly, and the result of the we
Dmitrij [34]

Answer:

a. Mean = 155.1 grams

b. Standard deviation = 0.37

c. Fractional uncertainty = 0.074

Step-by-step explanation:

a. Average weight

This is same as the mean weight;

Mathematically, that would be; sum of the weights/ the number of weights

= (155.1 + 154.8 + 155.5 + 155.3 + 154.6)/5 = 775.3/5 = 155.06 which is approximately 155.1

b. Standard deviation

Mathematically; we calculate that using the formula;

√{(x-mean)^2/(N-1)}

Please check attachment for for the complete breakdown of this

c. Fractional uncertainty

= Standard deviation/number of measurements = 0.37/5 = 0.074

7 0
3 years ago
14-2(x+8)=5x-(3x-34)
Scilla [17]

Answer:30=-34


Step-by-step explanation:

First you distribute so 2×X is 2X

2×8 is 16 then you do the other side but you put a one in front of the- so it goes 1 times 3x is 3x and you turn the minus into a plus sign and turn the positive 34 into a negative 34 so -34× 1 is -34 then write that out to look like 14-2X+16= 5X -3X + -34 then you add or subtract the commons which is 14+16= 30 and 5X-3X=2X so now your equation is 30-2x=2X+(-34) then you want to get your X on the same side so you subtract 2X from the right side and the left side then your left 30=-34

4 0
3 years ago
Evangeline is making snack bags for her class. If she can fill 5/8 of her snack bags with 1 2/3 cups of pretzels, how many cups
brilliants [131]

Answer:

2 2/3

Step-by-step explanation:

For each of her snack bag, she can fill it with a 1/3 cup of pretzels

1/3 x 8 = 2 2/3 cups

4 0
2 years ago
You earned $210 over 3 years on an account with a 7% interest rate. What was your initial deposit (principal)?
AveGali [126]

Answer:

3,000$

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
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