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3 years ago

Find the sum: -48 + -12 =

Mathematics

1 answer:

Jlenok [28]3 years ago

3 0

Answer:

-48+-12=. -60

Step-by-step explanation:

Well -48 +( -12)

Assume the plus sign is +1 ,multiply by 12 using the law of integers. that is +(-)= -. Then continue by subtracting -12 from - 48. with this another law is used -(-)= a plus . Like 48 + 12 =60.Then check for the number with the highest value to determine your answer for the sum you got. In this case negative 48 is the highest so it's negative 60

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2 years ago

Y+15 <3 for inequality

Hitman42 [59]

Hello there!

y + 15 < 3

Start by subtracting 15 on both sides

y + 15 - 15 < 3 - 15

y < -12

As always, it is my pleasure to help you guys on here. Let me know if you have any questions.

7 0

3 years ago

If the average of 3 numbers and 8 is 25 what is the sum of the three numbers

Gennadij [26K]

Let sum of 3 numbers be x.

Average of 3 numbers and 8 = $\frac{x + 8}{4}$

25 = $\frac{x +8}{4}$

100 = x +8

x= 92.

The sum of 3 numbers is 92.

3 0

2 years ago

Figure this out please Asap.

weeeeeb [17]

If the polygons are similar then the sides are in proportion.

$\dfrac{32}{24}=\dfrac{32:8}{24:8}=\dfrac{4}{3}$

Therefore we have the equations:

$\dfrac{x-1}{6}=\dfrac{4}{3}\qquad\text{cross multiply}\\\\3(x-1)=(4)(6)\\\\3x-3=24\qquad\text{add 3 to both sides}\\\\3x=27\qquad\text{divide both sides by 3}\\\\\boxed{x=9}$

$\dfrac{y+1}{21}=\dfrac{4}{3}\qquad\text{cross multiply}\\\\3(y+1)=(21)(4)\\\\3y+3=84\qquad\text{subtract 3 from both sides}\\\\3y=81\qquad\text{divide both sides by 3}\\\\\boxed{y=27}$

6 0

3 years ago

Can someone help me with this?

algol13

Answer: x=12

Step-by-step explanation:

we know that sum of a triangle is 180 degrees

one angle is 90 degree

the sum will be 90+(2x+1)+(5x+5)=180

substract 90 from both sides

2x+1+5x+5=180-90

7x+6=90

7x=90-6

divide by 7

x=12

8 0

2 years ago