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Lena [83]
3 years ago
12

The sum of a number and 12 is 20. What is the number?

Mathematics
2 answers:
babunello [35]3 years ago
8 0
--Answer--

The number is 8.
We verify:

x + 12 = 20 
x = 20 - 12
x = 8


Regards !
I hope it helps you :)
tia_tia [17]3 years ago
6 0
Build an equation from this phrase.

"The sum of a number and 12..." The word sum is the keyword of what operation we are doing. We are doing addition. When we continue the phrase we know we are adding a number (an unknown) and 12.

So, on the left-hand side we have x + 12.

"... is 20" In mathematics, the word 'is' can mean equal. So, the left-hand side will equal the number 20.

Now we have the equation x + 12 = 20.

Solve for x.

x + 12 = 20
x = 8 <-- Subtract each side by 12

So, x is equal to 8.
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In the following pictograph, how many total books have the four groups read?
professor190 [17]

Answer:

c; 54

Step-by-step explanation:

to find the answer you can first add all the books together

this can be represented by

3 + 2 + 2.5 + 1.5

this answer is 9

then multiply it by 6

9 * 6 = 54

is is c

4 0
2 years ago
Danielle's father gave her $113. Danielle bought 5 books, each of which cost $8. How much money does Danielle have left?
MrRissso [65]

Answer:63 I think

Step-by-step explanation:

5 times 8 = 40 113-40=63

7 0
3 years ago
Mario's Pizza delivers pizzas within a 10-mile radius of the restaurant. Their delivery times are Normally distributed with a me
ivanzaharov [21]

Answer:

a) 0.30854

b) 0.21186

c) 0.23468

Step-by-step explanation:

Mario's Pizza delivers pizzas within a 10-mile radius of the restaurant. Their delivery times are Normally distributed with a mean delivery time of 30 minutes and a standard deviation of 10 minutes.

We solve using z score formula.

z = (x-μ)/σ, where

x is the raw score

μ is the population mean

σ is the population standard deviation.

Find the probability that a randomly selected customer will have to wait

a) less than 25 minutes

for x < 25 minutes

z = 25 - 30/10

z = -0.5

Probability value from Z-Table:

P(x<25) = 0.30854

b) more than 38 minutes

For x > 38 minutes

z = 38 - 30/10

z = 0.8

Probability value from Z-Table:

P(x<38) = 0.78814

P(x>38) = 1 - P(x<38) = 0.21186

c) between 26 and 32 minutes

For x = 26 minutes

z = 26 - 30/10

z = -0.4

Probability value from Z-Table:

P(x = 26) = 0.34458

For x = 32 minutes

z = 32 - 30/10

z = 0.2

Probability value from Z-Table:

P(x = 32) = 0.57926

The probability that a randomly selected customer will have to wait between 26 and 32 minutes is calculated as:

P(x = 32) - P(x = 26)

= 0.57926 - 0.34458

= 0.23468

4 0
3 years ago
Plz help asap ill give brainlist to you
Citrus2011 [14]
Your answer is 6.643 kg

Because 1 gram is equal to 0.001 kilograms, 0.001 kg x 6,643 g = 6.643 kg

Hope this helps!
7 0
4 years ago
Read 2 more answers
NEED HELP QUICKLY!!
barxatty [35]
The answer is C 66 square inches
3 0
4 years ago
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