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igor_vitrenko [27]
3 years ago
9

I'm not sure of my answer I know that you have to multiply diagonally then add or subtract I'm not sure.

Mathematics
1 answer:
Dima020 [189]3 years ago
7 0
-18(1) = -18,right? 

4(3) = 12, right? 

-18 - 12 = -30

From the looks of it, we had to "Subtract" the outcome of each problem that we went over 

You're correct: -30 (option A.) would be your answer  

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5 barrels catch rainwater in the schoolyard. Four barrels are the same size, and the fifth barrel holds 10 liters of water. Comb
ch4aika [34]

Answer:

The volume each of the four barrels of the same size will be at least 47.5 liters.

Step-by-step explanation:

Let the volume of each of the four barrels is v liters.

Now, the amount of water that can be held in the fifth barrel is 10 liters. The total capacity of holding water for the 5 barrels combines is at least 200 liters.

So, from the above-given information, we can write the inequality to determine the volume of each of the four barrels will be  

10 + 4v ≥ 200

Solving this we get,

4v ≥ 190

⇒ v ≥ 47.5

Therefore, the volume each of the four barrels of the same size will be at least 47.5 liters. (Answer)

3 0
2 years ago
Can anyone explain dimensional analysis pleaseeee
dimaraw [331]
Is a problem solving method that uses that fact that any number or expression can be multiplied by one without changing it's value.
3 0
3 years ago
Oakland Middle school has 128 6th graders, 121 7th graders and 135 8th graders. If there are 3 teachers per 32 students, how man
zepelin [54]

Answer:

36 Teachers in Total

Step-by-step explanation:

I would use Ratio.

Students: 128 + 121 + 135 = 384 total students

Teachers: Students

3 : 32

36 : 384

384 ÷ 32 = 12

12 x 3 = 36

6 0
3 years ago
I'm confused how to solve this, can someone help??
frutty [35]
Add one on both sides of the equation. You would end up with -6=x/3. You would then cross multiply, so -6 times 3 and 1 (the denominator for -6) times x and you would get -18=x
6 0
3 years ago
Read 2 more answers
If the difference between a number and 21 is divided by2, the result is 4 times the number. What is the number
Ostrovityanka [42]
(n-21)/2=4n is the equation

First, divide what is in the parentheses by 2
0.5n-10.5=4n

Then, multiply the whole equation by 2 so we have all whole numbers
n-21=8n

Move N so that it is with 8n
7n=-21

Divide 21 by 7
n=-3

Solution: The number (n) is equal to -3
6 0
3 years ago
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