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3 years ago

What expression con you substitute in the indicated equation to solve the system below?

1 answer:

6 0

Looking at the first half of all the options, only x=2-4y can be derived from the original equations therefore
Final answer:
A. 2-4y for x in 5x+y=8
Hope I helped :)

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Definition and example of variable

Studentka2010 [4]

Answer:

Step-by-step explanation:

Definition: A letter that is placed in an unknown number place.

Example: 8+B+9

The variable would be B.

6 0

3 years ago

Read 2 more answers

A service station will be built in the highway, and a road will connect it with cray. How long will the new road be?

abruzzese [7]

Answer: 24 mi

Step-by-step explanation:

Let the points A, B, C and S represent Alba, Blare, Cray and Service station respectively,

Then According to the question,

We have to find out the line segment CS = x = ?

Now, In the triangles ACB and CSB,

$\angle ACB\cong \angle CSB$ ( Right angles )

$\angle ABC\cong \angle CBS$ ( Reflexive angles )

Thus, by AA similarity postulate,

$\triangle ACB\sim\triangle CSB$

By the property of similar triangles,

$\frac{AB}{CB}=\frac{AC}{CS}$

$\implies \frac{50}{30}=\frac{40}{x}$

$\implies 50x=30\times 40$

$\implies 50x = 1200$

$\implies x =24$

Thus, the length of the new road = 24 miles

7 0

3 years ago

1. the sum of the first n odd positive integers is 64. what is the value of n ?

77julia77 [94]

Step-by-step explanation:

1. 64=1+3+5+7+9+11+13+15 that is a total of 8 odd numbers so n=8

2.((new-old)/old)×100%=percentual difference

so ((new-$55)/$55)×100%=20%

new-$55=$55×0.2

new=$55+$55×0.2=$66

3 0

4 years ago

F(x) = x^2 - x^3 Select the value of f(-2) A. -4 B. 4 C. -12 D. 12

Ray Of Light [21]

Answer:

Step-by-step explanation:

To evaluate f(- 2) substitute x = - 2 into f(x), that is

f(- 2) = (- 2)² - (- 2)³ = 4 - (- 8) = 4 + 8 = 12 → D

5 0

3 years ago

HELP ME OMG HSLPEKSSMW

ki77a [65]

B

14 pounds in ounces is 64
64+10(from the pineapples)=74
74/6(that how many servings he wants)=13

4 0

3 years ago