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kogti [31]
2 years ago
10

Solve using linear combination. Show all work. 9X + 5Y 35 And -2x-5y=0

Mathematics
2 answers:
BARSIC [14]2 years ago
5 0

Answer:

x=5, y=-2

Step-by-step explanation:

9x + 5y =35

-2x-5y=0

Add the equations together

9x + 5y =35

-2x-5y=0

----------------------

7x  = 35

Divide each side by 7

7x/7 = 35/7

x = 5

Now find y

9x+5y = 35

9(5) +5y = 35

45 +5y =35

Subtract 45 from each side

45-45 +5y = 35-45

5y = -10

Divide each side by 5

5y/5=-10/5

y = -2

Mice21 [21]2 years ago
5 0

Answer:

solve your equation then Subtract 2x from both sides next Subtract 2 from both sides. last Divide both sides by 2

Step-by-step explanation:

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A pancake recipe requires 1 & 2/3 cups of flour to make 20 pancakes and you have 9 cups of flour. How many pancakes can you
wolverine [178]

Answer: 108 pancakes

Step-by-step explanation:

if you make 20 pancakes with  1 and 2/3 of flour,

with 9 cups you will make

(20*9)/ 1 &2/3

1  2/3= 5/3 we enter the whole in the fraction

(180)/(5/3)= 180*3/5=108 pancakes

8 0
3 years ago
Which of the following would not have a positive exponent when written in scientific notation HELP PLEASE!!!!
Contact [7]

Answer:B

Because when 0.0023 is written in scientific notation the answer is 2.3×10-³ which a negative sign

Step-by-step explanation:

5,600,000

5,600,000÷10

560,000

560,000÷10

56,000

56,000÷10

5,600

5600÷10

560

560÷10

56

56÷10

5.6

5.6×10⁶

23÷10

2.3

2.3×10¹

560÷10

56

56÷10

5.6

5.6×10²

0.0023

0.0023×10

0.023

0.023×10

0.23

0.23×10

2.3

2.3×10-³

3 0
3 years ago
Cual es resultado de 8.5 × 10^4 - 3.0 × 10^3
Veronika [31]
Simplify 10^4 to 10000

8.5x10000-3.0x10^3

Simplify 8.5x*10000 to 85000x
85000x-3.0*10^3
Simplify 3.0x10^3 to 3*10^3
Answer 85000x-3*10^3
5 0
3 years ago
1. What is the solution to the system below?<br> x+y=5<br> 1x- y=3
Alika [10]

Answer:

(4,1)

Step-by-step explanation:

x+y=5

x- y=3

Add the equations together to eliminate y

x+y=5

x- y=3

--------------------

2x = 8

Divide each side by 2

2x/2 = 8/2

x = 4

Now we can find y

x+y = 5

4+y = 5

Subtract 4 from each side

4+y-4 = 5-4

y =1

5 0
3 years ago
Gordon has a round tablecloth with a radius of 4 feet. What is the tablecloth's diameter?<br> feet
lozanna [386]

Answer:

it's a round so

d=2r

d=8 feet

8 0
3 years ago
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