3 years ago

I need help with A-I on #1

Mathematics

1 answer:

kumpel [21]3 years ago

7 0

Answer:

1a. 104

1b. 8x

1c. 13y

1d. xy

1e. 3+y

1f. x+7

1g. x-y

1h. x divided by y

1i. x+3

1j. 3x

1k. y-5

1l. 1/5y

2a. 26

2b. x+9

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What is the solution to this system of equations? {5x+4y=22 3x+4y=10

zlopas [31]

Multiply 2nd equqation by -1 and add to first

5x+4y=22
-3x-4y=-10 +
2x+0y=12

2x=12
divide by 2
x=6

sub back

3x+4y=10
3(6)+4y=10
18+4y=10
minus 18 both sides
4y=-8
divide by 4
y=-2

(x,y)
(6,-2) is solution

6 0

3 years ago

Read 2 more answers

Christopher has breakfast at a cafe and the cost of his meal is $36.00. Because of the service, he wants to leave a 10% tip.

Fofino [41]

The cost of his meal at a cafe is $36.00 and Cristofer wants to leave a 10% tip. So to find what is his total bill, you have to count 10% from $36.00.

Note that

$36.00 -- 100%,

$x -- 10%.

Write aproportion:

$\dfrac{\$36.00}{\$x}=\dfrac{100\%}{10\%}.$