MATHEMATICS MIDDLE SCHOOL

Y=4x+19
-8x-5y=-11
Can u help me on this

Answers

Answer 1
Answer: y=4x+19 (1)
-8x-5y=-11 (2)
sub 1 into 2
-8x-5(4x+19)=-11
-8x-20x-95=-11
-28x-95=-11
-28x=84
x=84/-28
x= -3
sub into 1
y=4(-3)+19
y=7

therefore x= -3 and y=7
Answer 2
Answer: I'm just going to do substitution
Steps:
1. Substitute the y in -8x-5y=-11 for 4x + 19

-8x-5(4x + 19)= -11
-8x + (-20x) + (-95)= -11
-28x + (-95)=-11
2. Now add 95 on both sides
-28x= 84
3. Divide by 28 on both sides
4. X=-3
5. Now substitute the x in y= 4x + 19 for -3
Y= 4(-3) + 19
Y= -12 + 19
Y= 7
6. Your answer is x = 3 and y= 7 or (3,7)

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Mia's cat weighs 13 pounds, 7 ounces. About what is that weight in kilograms?

Answers

so oz to kilograms
1 oz=0.0283495 kilograms

first convert 13 pounds to oz
16 oz=1 poiund
13 pounds=16 times 13 oz=208 oz
add
208+7=215 oz

so 215 oz=0.0283495 times 215=6.095=6
answer is 6 kilograms

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What is the value of C in the equation 12 C minus 53 equals 91

Answers

12c - 53 = 91

First add 53 to each side.  This cancels it out on the left (-53 + 53 = 0)

12c = 91 + 53
12c = 144

Now divide by 12 on each side.  This cancels the 12 on the left (12/12 = 1)

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Hi Zack

12c-53=19

Add 53 to both sides

12c-53+53=91+53

12c=144

Divide both sides by 12

12c/12= 144/12

c= 12

I hope that's help !

P=$14,400 r=7 1/2 t=4

Answers

P=14,400

R= 7 1/2 7.5

T=4

I= 14,400 x 0.075.x 4

I= 4,200

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Answers

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