2 years ago

Find the solution of the system of equations. –7x – 3y = –20 3х + 6= -15

Mathematics

1 answer:

Nutka1998 [239]2 years ago

7 0

Answer:

(-7,23)

Step-by-step explanation:

You can use the app photo math

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Expand this expression (x-y)²<br>

pochemuha

Answer:

x^2 - 2xy + y^2.

Step-by-step explanation:

(x - y)^2

= (x - y)(x - y)

= x(x -y) - y(x - y)

= x^2 - xy - xy + y^2

= x^2 - 2xy + y^2.

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2 years ago

What is 5/3 as a percent

IrinaVladis [17]

Answer:

%167

Step-by-step explanation:

5 divided by 3 is 1.67 so times that by 100 and you get %167

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2 years ago

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D) What is the area of a circle with a radius of 1/2 inch?

erik [133]

Answer:

0.79

Step-by-step explanation:

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2 years ago

I need help with 3 please... I don’t know how to do it and I know my answer is wrong... please

harina [27]

It will take 20 hours I think because 8,16,32,64 is the sequence of cars waxed and 3,6,12,24 are the hours, 64 take 4 away = 60. and then 24, I took 4 away from 64 so it would be 20 if I took away 4

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2 years ago

True or false: Two lines with undefined slopes are parallel to each other and parallel to the y axis

BlackZzzverrR [31]

Correct! lines that have undefined slopes are always parallel to the y-axis as the change in x is 0. A gradient is calculated by the change in y divided by the change in x and anything divided by 0 is referred to as undefined.

$\frac{y_{1}- y_{2} }{x_{1}- x_{2} }$

(calculation for a gradient)

Hope that helps sorry if its a bit confusing :)

5 0

2 years ago