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nexus9112 [7]
3 years ago
14

Write and describe the four steps for using the linear combination method to solve a system of equations, use complete sentences

. 1. Arrange. 2. multiply if needed. 3. Add or subtract and solve. 4. Find the other variable. ALWAYS CHECK Solve this system using the linear combination method. Show your work and explain each step. 2x + y = 8 x − y = 4
Mathematics
1 answer:
vodomira [7]3 years ago
7 0

Answer:

Step-by-step explanation:

2x+y=8x-y=4

First solve take all x variable to one side and all the y on one

y+y=8x-2x=4

2y=6x=4

Solve for x solve for y

6x=4 2y=4

x=4÷6 y=2

x=4/6

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Help in Circumference of a circle A small pizza has a diameter of 21 cm.
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The circumference of any circle is (pi) x (the diameter of the circle).

The problem gives you both numbers, so all you have to do is multiply them.

Circumference = (pi) x (diameter) = (3.14) x (21cm) = <em>65.94 cm .</em>


3 0
3 years ago
Please look at this multiple choice, thanks!
Nastasia [14]

Step-by-step explanation:

\frac{y - y1}{x - x1}  =  \frac{y2 - y1}{x2 - x1}

\frac{y - 0}{x - ( - 1)}  =  \frac{3 - 0}{1 - ( - 1)}

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3 years ago
Three more than the quotient of a number and 5 is equal to 9
mars1129 [50]

Answer:

The number is 30.

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x/5+3=9

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7 0
3 years ago
How much does a glass cube with a side of 5-cm weigh if 1cm3 of glass weighs 2 2/5 grams?
PtichkaEL [24]

The weight of galss cube with side 5 cm is 300 grams

<em><u>Solution:</u></em>

A glass cube is of side length 5 cm

Let us first find the volume of glass cube

<em><u>The volume of cube is given as:</u></em>

volume = (side)^3\\\\volume =5^3 = 125

Thus volume of cube is 125 cm^3

Given that,

1 cm^3 = 2\frac{2}{5} \text{ grams }\\\\1 cm^3 =\frac{12}{5} \text{ grams}

So, weight of 125 cubic centimeter of glass cube is found by multiplying weight of 1 cubic centimeter of glass cube by 125

\text{ Weight of 125 } cm^3 \text{ cube } = \text{ Weight of 1 } cm^3 \text{ cube } \times 125

\text{ Weight of 125 } cm^3 \text{ cube } = \frac{12}{5} \times 125 = 25 \times 12 = 300

Thus weight of galss cube with side 5 cm is 300 grams

3 0
4 years ago
Read 2 more answers
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