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2 years ago

Operations with fractions

Mathematics

1 answer:

matrenka [14]2 years ago

8 0

Step-by-step explanation:

$\frac{2}{3} - \frac{1}{5} = \frac{10}{15} - \frac{3}{15} = \frac{7}{15}$

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Write 60% as a

Setler79 [48]

Answer:

The answer is three fiths

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2 years ago

Use elimination to solve each system if equation 3x+2y=0and x-5y=17

kotykmax [81]

Answer:

$y = -3$

$x=2$

Step-by-step explanation:

$3x + 2y = 0$

$x - 5y=17$

to use the elimination you have to make one of the numbers same

$3(x-5y=17)$

and you would have to change the sign so that both of the 3x could cancel out.

New system of equation

$3x + 2y = 0$

$-3x+15y=-51$

$17y=-51$

$y = -3$

so we know the y value so now you could find the x value take one equation

$x - 5y=17$

$x +15=17$

$x = 2$

you could try it with both of the equations

$3x + 2y = 0$

$3x + - 6=0$

$3x-6=0$

$3x=6$

$x=6/3$

$x=2$

6 0

3 years ago

45% of a number is 180

topjm [15]

Step-by-step explanation:

45% of number = 180

=> 100% of number = 180 * (100/45) = 400.

Hence the number is 400.

3 0

3 years ago

Guys please i beg you help me

aev [14]

Answer:

( A . ans )expressions that work the same even though they look different.

4 0

2 years ago

What is the value of this expression? (-2)^5

s344n2d4d5 [400]

(-2)⁵................ => (-2)(-2)(-2)(-2)(-2)...........=> -32.

recall, minus times minus is plus, and minus times plus is minus.

8 0

3 years ago

Read 2 more answers