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lys-0071 [83]
3 years ago
7

How can You use mental math for 878 + 534=

Mathematics
2 answers:
antoniya [11.8K]3 years ago
6 0
Think of it like your drawing it in your head
in my head i would say 8+4=12 carry the 1 so 7+3+1= 11 carry the 1 then 8+5+ 1= 14 so the answer would be 1,412
Alex Ar [27]3 years ago
4 0

Answer:

the answer would be 1412

Step-by-step explanation: Take the '4' in 534, add it to the 878 in your head. Thus resulting in 882. Then add the 30 to this number. After adding 30, you should get 912. Then add 500, and your answer is 1412.

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6r-2(r+8)=11<br> Solve equation
pav-90 [236]

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4 0
4 years ago
A girl is walking 10 miles every 3 hrs whats her average speed ♥
Nookie1986 [14]
We want to find miles per hour.
Speed is distance over time.
So take 10 miles (distance) / 3 hours (time)
This is the same as 10/3.
10/3 = 3 and 1/3
Therefore, the girl is going 3 and 1/3 miles per hour.
6 0
3 years ago
What is the solution set for 6x−9=15, given the replacement set {0, 1, 2, 3, 4}?
vfiekz [6]
6x-9=15
6x=24
x=4
Therefore the answer is A.

Hope this helps :)
6 0
3 years ago
Read 2 more answers
1. Which of the following is the x-coordinate of the solution to the system shown below?
astra-53 [7]

Answer:

x=9

Step-by-step explanation:

Using elimination method.

Add equation 1 to equation 2

x + y = 11

x - y = 7

---------------

2x + 0 = 18

Divide both sides by 2

2x = 18

---- ----

2 2

x = 9

3 0
3 years ago
Mrs. Johnson's first test's data: 59, 22, 87, 44, 96, 38, 70, 85, 79. The third step in creating a Box-and-Whisker plot is to de
vfiekz [6]

Answer:

Q3 = 85

Step-by-step explanation:

Do the same thing you do to find the median for the numbers 70 to 96, i.e. exclude the numbers less than the median.

7 0
3 years ago
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