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Delvig [45]
3 years ago
5

If 8+x* = 57, then x = ?

Mathematics
1 answer:
Sedbober [7]3 years ago
6 0

Answer: 49

Step-by-step explanation:

if you subtract 8 from 57 you’ll get 49, and 49 +8= 57

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Find the value of x.<br> 3x +7<br> D<br> 2x + 7<br> 3x 16
Mashcka [7]

Answer:

sum of interior angle of a triangle is 180 degree

so,

3x +7 + 2x+7 +3x+6 = 180

8x + 20 = 180

8x = 180 - 20

8x = 160

x = 160/ 8

x = 20

May it will help you

7 0
3 years ago
Read 2 more answers
Consumer Reports indicated that the average life of a refrigerator before replacement is 14 years with a standard deviation of 2
guajiro [1.7K]

Answer:

a.) Average life of a refrigerator

b.) 0.1151

c.) 0.0548

d.) 0.6472225

Step-by-step explanation:

Given that :

Average life before replacement, mean, m = 14 years

Standard deviation, σ = 2 years

A.)

The random variable is the variable which is being measured.

B.) What is the probability that someone will keep a refrigerator fewer than 11 years before replacement?

Fewer than 11 years, P(x < 11)

We need to obtain the Z probability, at P(Z < 11)

The Zscore = (x - mean) / standard deviation

Zscore = (11 - 14) / 2.5 = - 1.2

P(Z < - 1.2) = 0.1151

C.) What is the probability that someone will keep a refrigerator more than 18 years before replacement?

More than 18 years, P(x > 18)

We need to obtain the Z probability, at P(Z > 18)

The Zscore = (x - mean) / standard deviation

Zscore = (18 - 14) / 2.5 = 1.6

P(Z > 1.6) = 0.0548

D.) What is the probability that someone will replace a refrigerator between 8 and 15 years?

P(x < 8)

The Zscore = (x - mean) / standard deviation

Zscore = (8 - 14) / 2.5 = - 2.4

P(Z < - 2.4) = 0.0081975

P(x < 15)

The Zscore = (x - mean) / standard deviation

Zscore = (15 - 14) / 2.5 = 0.4

P(Z < 0.4) = 0.65542

P(Z < 0.4) - P(Z < - 2.4)

0.65542 - 0.0081975 = 0.6472225

5 0
3 years ago
Subtract 5/8- 5/12 Enter your answer below as a fraction in lowest terms, using
alisha [4.7K]

Answer:

5/8 - 5/12 = (5×3/8×3)-(5×2/12×2)15-10/24 = 5/24

Step-by-step explanation:

first find out the LCM ( Lowest Common Multiple ) of the denominators              ( here:24 ) and multiply the denominator and numerator , both with the required no. to make the denominator as equal as the LCM [( 5×3/8×3 ) -          ( 5×2/12×2)] and subtract / add the numerators. the answer you get is the correct answer.

hope that is helpful for your future.

best of luck

8 0
3 years ago
A company sells songs online for $1.29 per song. If they sold 2000 songs in one day, how much money did they make that day?
AlekseyPX
By hypothesis, we know that one song costs $1.29
If they sold 2000 songs in one day, they made 2000 * 1.29 = 2580

So they made $2580 by selling 2000 songs.

Hope this helps! :)
8 0
3 years ago
Read 2 more answers
100 packages of bagels sold, 15 of them are sesame seed bagels, what percent of the bagel packages are sesame seed bagels?
aalyn [17]
100 - 15 = 85

15/100

15 ÷ 100 = 0.15

0.15 × 100 = 15
15%

15% of the packages are sesame seed bagels 
4 0
3 years ago
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