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k0ka [10]
3 years ago
8

What is the value of y when y = 4x - 1 and x = 7/2

Mathematics
1 answer:
babunello [35]3 years ago
7 0
The answer to y= 4x- 1 is 13. substitute 7/2 at x and do 4 times 7/2 minus 1.
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Simplify the algebraic expression: 4(3x + y) – 2(x – 5y)
VladimirAG [237]

Answer:

C

Step-by-step explanation:

First use distribution

4(3x+y)= 12x+4y

and

-2(x-5y)= -2x+10y

combine the 2 answers

10x+14y

3 0
3 years ago
Select the decimal that is equivalent to 101/500
s344n2d4d5 [400]

The answer should be .202. If the question is looking for rounding, it might want .2 instead, but only if it tells you to round. Just divide 101 by 500 in a calculator and that's your answer.

Hopefully this helps! Let me know if you have any more questions.

4 0
3 years ago
Read 2 more answers
A chemical company makes two brands of antifreeze. The first brand is 20% pure antifreeze, and the second brand is 70% pure anti
andre [41]

Answer:

First brand of antifreeze: 21 gallons

Second brand of antifreeze: 9 gallons

Step-by-step explanation:

Let's call A the amount of  first brand of antifreeze. 20% pure antifreeze

Let's call B the amount of second brand of antifreeze. 70% pure antifreeze

The resulting mixture should have 35% pure antifreeze, and 30 gallons.

Then we know that the total amount of mixture will be:

A + B = 30

Then the total amount of pure antifreeze in the mixture will be:

0.2A + 0.7B = 0.35 * 30

0.2A + 0.7B = 10.5

Then we have two equations and two unknowns so we solve the system of equations. Multiply the first equation by -0.7 and add it to the second equation:

-0.7A -0.7B = -0.7*30

-0.7A -0.7B = -21

-0.7A -0.7B = -21

               +

0.2A + 0.7B = 10.5

--------------------------------------

-0.5A = -10.5

A = \frac{-10.5}{-0.5}

A = 21\ gallons

We substitute the value of A into one of the two equations and solve for B.

21 + B = 30

B = 9\ gallons

3 0
2 years ago
A salesperson sold 30% of their books in stock on Monday. Then they sold 60% of their remaining books on Tuesday. What percent o
Valentin [98]

Answer:

10%

Step-by-step explanation:

60% + 30%=90%

so they have 10%of the original amount left.

7 0
3 years ago
somebody please help me on this it is for geometry please don’t waste my answers i’ll mark you the brainliest
vivado [14]

Answer:

Smallest: XY

Second smallest: YZ

Biggest: XZ

Step-by-step explanation:

First, just observe the triangle,

see which one is the smallest,

if you just look, it would be XY

Next, the second smallest looks like YZ

Lastly, the last side is the largest if you just look at it

6 0
3 years ago
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