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3 years ago

PLLEEAASSEE HELP ME!!!!! 20 POINTS AND BRAINLIEST ANSWER

1 answer:

5 0

1x+3y=8
3x+2y=10

solve

multiply first equation by -3 and add to 2nd equation

-3x-9y=-24
<u>3x+2y=10 +</u>
0x-7y=-14

-7y=-14
divide by -7 both sides
y=2

sub back
x+3y=8
x+3(2)=8
x+6=8
minus 6
x=2

wow

both juices cost $2 per gallon

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A rectangular prism has a height of 15 centimeters and a width of 6 centimeters. The surface area of the prism is 684 square cen

Kazeer [188]

B. 12 cm

a= 2(hl x wl x hw)

6 0

2 years ago

5=1/2x - 3 please help me out

liq [111]

Answer:

x = 16

Step-by-step explanation:

5 = 1/2(x) - 3

Add 3 to both sides.

8 = 1/2(x)

Rewrite for clarity.

1/2(x) = 8

x/2 = 8

Multiply both sides by 2.

x = 16.

Proof:

5 = 1/2(x) - 3

Substitute variable.

5 = 1/2(16) - 3

Multiply 1/2 and 16.

5 = 8 - 3

Subtract 3 from 8.

5 = 5

3 0

3 years ago

If m is a common divisor of x and y, then x/y = (x ÷ k)/______

myrzilka [38]

Answer:

$\frac{x}{y} = \left(\frac{x}{y} \right)\cdot 1 = \left(\frac{x}{y}\right)\cdot \left(\frac{m}{m} \right) = \frac{\frac{x}{m} }{\frac{y}{m} }$

Step-by-step explanation:

The common divisor is the greatest natural number so that two or more natural numbers have no remainder. If $m$ is a common divisor of $x$ and $y$ , then $p = \frac{x}{m}$ and $q = \frac{y}{m}$ , where $p$ , $q$ $\in \mathbb{Z}$ . Then, we have the following expression:

$\frac{x}{y} = \left(\frac{x}{y} \right)\cdot 1 = \left(\frac{x}{y}\right)\cdot \left(\frac{m}{m} \right) = \frac{\frac{x}{m} }{\frac{y}{m} }$

3 0

2 years ago

Two sides of a triangle measure 9 cm and 23 cm. Which could be the measure of the third side of the triangle?

Verizon [17]

Hello,

Let's be x the length of the 3 side (9,x,23) ==>x>0

Using inequality triangular:

9<x+23==>x>9-23==>x>-14 (done)
x<9+23==>x<32
23<x+9==>x>14

SO 14<x<32

8 0

3 years ago

Read 2 more answers

_2. You have a part-time job 4 days per week, 5 hours per day. How many hours will you work in two weeks?

marta [7]

Answer:

C) 40

Step-by-step explanation:

For every one day your work is 5 hours.

1 day = 5 hours

Set up a proportion so it would be:

$\frac{1 day}{5 hours} = \frac{4 days}{x hours}$

4 days x 5 hours = 20 hours/week

So now you know you know you work 20 hours/week, then multiply by 2 since they're asking how many hours will you work in two weeks:

20 hours x 2 weeks = 40 hours in two weeks

6 0

2 years ago