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Nadya [2.5K]
2 years ago
15

Solve the system by substitution​

Mathematics
1 answer:
Alexxandr [17]2 years ago
5 0
1) Solve one of the equations for either variable.

2) Substitute the expression from Step 1 into the other equation.

3) Solve the resulting equation.

4) Substitute the solution in Step 3 into one of the original equations to find the other variable.

5) Write the solution as an ordered pair.
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The population of a country was estimated to be 1.114 x 10^8. On this day, the population of the world was 3.853 x 10^9.
Lelechka [254]

Step-by-step explanation:

To find how many people lived outside of the country we subtract:

3.853 × 10^{9} - 1.114  × 10^{8}  = 3.7146 ×

To find the percentage of people living inside the country, we divide:\frac{1.114 x10^{8}}{3.853 x10^{9}} =2.8913x10^{-2} percent or 2.89%.  Which is extremely small.

6 0
3 years ago
(x+2)(4+y)(5+6)(2+x)(4+0.5x)
Yuki888 [10]

(x+2)(4+y)(5+6)(2+x)(4+0.5x)

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11(x^2 +4x+2) (16+4y+2x+.5xy)

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5.5 x^3 y + 22 x^3 + 66 x^2 y + 264 x^2 + 198 x y + 792 x + 176 y + 704

3 0
3 years ago
9/10 + 7/8 in simplest form
guajiro [1.7K]
The answer is 31/40

because first you got cane both of the fraction to the same denominator. 

72/80 + 70/80

Add 72+70=142.

142/80 change it to an mixed number and it will be 1 31/40 in simplest form. 
8 0
3 years ago
Read 2 more answers
BRAINLIEST
IrinaVladis [17]

Answer:

We know that a negative value is positive of all even exponents and negative for all odd exponents.

y=(-1)^x

5 0
3 years ago
Its like a word question?
Sloan [31]

Answer:

-3+x=x+4

Step-by-step explanation:

Pls Mark Brainliest

5 0
3 years ago
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