3 years ago

3x+2y=10 12x+5y=25 Solve by substitution or elimination

1 answer:

5 0

3x + 2y = 10 ....multiply by -4
12x + 5y = 25
-------------------
-12x - 8y = -40 (result of multiplying by -4)
12x + 5y = 25
------------------add
-3y = - 15
y = -15/-3
y = 5

3x + 2y = 10
3x + 2(5) = 10
3x + 10 = 10
3x = 10 - 10
3x = 0
x = 0

solution is (0,5)

You might be interested in

3/12+ = 7/12 as a faction <br><br> please help me

ohaa [14]

Answer:

10/12 or simplified its 5/6

Step-by-step explanation:

3+7 = 10

you keep the 12

10÷2 = 5

12÷2=6

common denominator

6 0

4 years ago

Factor completely 2x^2 − 2x − 40. 2(x − 5)(x 4) (2x − 10)(x 4) (x − 5)(2x 8) 2(x − 4)(x 5)

Zina [86]

2x^2 - 2x - 40 = 2x^2 -10x + 8x - 40 = 2x(x - 5) + 8(x - 5)

= (x-5)(2x+8) = 2(x-5)(x+4)

3 0

3 years ago

If diana spends 25 minutes running at the gym how many minutes does she spend lifting weight

eimsori [14]

Answer:

Step-by-step explanation:

The question doesn’t say that she lifted weights

6 0

3 years ago

Read 2 more answers

Find the product of 0.51 x 2.427

Natalka [10]

Answer:1.23777

Step-by-step explanation: Calculators answer

7 0

2 years ago

The owner of a flower shop sells18 roses for $90.00. What is the cost in dollars per rose?

defon

each rose is $5 bc 90/18 is 5

3 0

3 years ago