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yawa3891 [41]
4 years ago
14

What is the value of x

Mathematics
1 answer:
lianna [129]4 years ago
5 0

Answer:

answer: 20

Step-by-step explanation:

(3x+11)+(5x+9)=180 <--- given

8x+20=180  <----- combine like terms

8x=160 <----- subtraction prop. of equality

x=20  <----- division prop. of equality

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I need help I’ve been trying to figure this one out could get it
erastovalidia [21]

Answer:

The result is 7.8 * 10^3

Step-by-step explanation:

When we are dividing in scientific notation, divide the numbers in front

7.8/1 = 7.8

Subtract the exponents on the powers of 10

10^(7-4) = 10 ^3

The result is 7.8 * 10^3

3 0
3 years ago
Solve for 2/3(9 - 6) + 40<br> and 7/8 - (-1/10) + (-3/5)
masha68 [24]

Answer:

first one is 42

second one is 3/8

Step-by-step explanation:

4 0
3 years ago
A persons bill at a restaurant is $42.75. Estimate the amount of a 15% tip
Alina [70]

$6.41

Step-by-step explanation:

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7 0
3 years ago
What is is advantage to using equations
poizon [28]
Well, you can put various math problems into one. Equations can also show more information easier than writing many problems. Hope this helps, and keep learning!
8 0
4 years ago
Read 2 more answers
Sorry I'm dum,b and don't know scientific notation very well please explain for brainly =D
yuradex [85]
The simplest I can put it

10^1 = 10
10^2 = 100
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(essentially the number of zeroes)

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Same works for numbers smaller than zero

5*10^-2 = 5*.01 = .05 (moving the decimal to the right 2 places
7 0
3 years ago
Read 2 more answers
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