All categories

2 years ago

Solve the system of equations by elimination. 2x+8y=10 -4x-9y=-13 x = y =

1 answer:

8 0

So use cancelation
multiply first equation by 2
2x+8y=10
times 2
4x+16y=20
now add

4x+16y=20
<u>-4x-9y=-13 +
</u>0x+7y=7
7y=7
divide by 7
y=1

subsittue

2x+8y=10
2x+8(1)=10
2x+8=10
subtract 8 from both sides
2x=2
divide by 2
x=1

x=1
y=1
<u />

You might be interested in

Please help!! Greatly appreciated <3

Margaret [11]

Answer:

30?

Step-by-step explanation:

divide 20 by 8 and then times the answer by 12

7 0

2 years ago

Slove (3x-2)=(2x-1)/(2) show step by step

shusha [124]

Answer:

x= 3/4

Step-by-step explanation:

$(3x - 2) = \frac{(2x-1)}{2}$

2(3x - 2) = (2x - 1)

6x - 4 = 2x -1

4x = 3

x= 3/4

3 0

1 year ago

Read 2 more answers

Which are linear pairs? Check all that apply.

boyakko [2]

Answer:

Options B, C and D

Step-by-step explanation:

Linear pair of angles means sum of the angles of the pair is 180° which are formed at a point of a line.

In other words, pair of supplementary angles is the linear pair.

From the figure attached,

Pair of the linear angles are,

1). ∠BAC and ∠CAD

2). ∠BAE and ∠EAD

3). ∠EAD and ∠DAC

Therefore, Options B, C and D are correct.

5 0

2 years ago

Read 2 more answers

50 points

mixas84 [53]

I believe it’s b I am not sure
Step by step explanation

8 0

2 years ago

Read 2 more answers

4(x + 1) − 7x = −3 (x − 1) + 1

grigory [225]

The apartment complex has 20 apartment per buildings 4 apartment are 3 bedroom apartment, 7 are 2 bedroom unit,and 9 apartment are 1 bedroom units.if the apartment complex builds 50 buildings how many 3 bedroom units would they have?

7 0

3 years ago