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-Dominant- [34]
3 years ago
15

How do you solve this problem 5(x-3)+7=5x-8

Mathematics
1 answer:
emmainna [20.7K]3 years ago
4 0
5(x-3)+7=5x-8
5*x=5x        5*3=15        
5x-15+7=5x-8
15+7=22    
5x-22=5x-8
5x+5x=10x
10x-22=8
22+8=30
10x=30
---------- (Divide by 10 to get x alone)
    10
x=3
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What is the exact value of x?
Nadya [2.5K]
Exact value of x will be 8 x sin(60)

Exact value of sin 60 = √3/2

So √3/2 x 8= 8 √3/2

Can be simplified to 4 √3
8 0
2 years ago
The sum of two numbers is 25. Their difference is 9. What are the two numbers?
Lynna [10]
Using x and y as the numbers

x+y=25 -------#1
x-y=9  -------#2

Using addition of #1 and #2
x+y+x-y= 25+9
2x+0y=34
2x=34
x=17

Using the value of x and plugging said value into #1 or #2, we can find y
x=17

x+y=25
17+y=25
y=8

OR

x-y=9
17-y=9
-y=-8
y=8

The numbers are 8 and 17
5 0
3 years ago
Read 2 more answers
Help please asap tysm! 10 brainly points! Will mark brainliest if you put in a random answer you will be reported! Tysm! <3 N
Ivan

Answer:

The surface area of the prism is 276 in.²

If you are also looking for the volume of the prism, it is 280.

Step-by-step explanation:

It's hard to find the surface area and the volume of the prism if you're just looking at the net of the 3D shape. There are some unnecessary measurements that will definitely throw you off. I drew a sample prism so it's easier to solve. Check the linked image.

The formula in finding the surface area of a prism is SA = 2(wl + hl + hw), where w is for width, l is for length, and h is for height. The point of all of these calculations is to find the area of 3 different faces of the prism and then you add up all of the areas and multiply the sum by 2 to give you the surface area. Looks a lot but it's worth getting the answer right.

The formula in finding the volume of the prism is V = w * h * l, where w is for width, h is for height, and l is for length. Simple multiplication of 3 different sides and you'll get the volume. I hope this helps and if I am wrong please let me know! :D

7 0
3 years ago
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Please help me. I don't get this unit and need help. Will crown first correct answer.
vesna_86 [32]

Answer: 925 over z

Step-by-step explanation:

James bought juice for his class party

Juice label says container has the quantity of juice = 925 ml

If y is the number of servings of juice and z is the number of milliliters per serving then

5 0
3 years ago
Help please :) (asap)
ryzh [129]

x^2 - x - 6= 0

(x - 3) ( x + 2) = 0

Equating

x - 3 = 0

x = 3

x+ 2= 0

x = -2

4 0
3 years ago
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