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Zigmanuir [339]
3 years ago
15

Use the substitution method to solve the system of equations.

Mathematics
1 answer:
grandymaker [24]3 years ago
5 0
Insert 3x - 7 for y in 15x - 5y = 14
15x - 5(3x - 7) = 14
15x - 15x + 35 = 14
0 = -21
There is no solution.
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Read 2 more answers
Create an equation with one solution of x = −4.
katen-ka-za [31]

Answer:

What is missing is -5x - 20

Step-by-step explanation:

To find this, simply solve for the parenthesis as if it were a variable of its own. This will allow you to see exactly what is missing.

8x - (x - 20) = 2x - (_______)

8x - x + 20 = 2x - (_______)

7x + 20 = 2x - (_______)

5x + 20 = - (_______)

-5x - 20 = (_______)

So the answer for the parenthesis is -5x - 20

3 0
4 years ago
A certain store is having a sale on all the items.All items are 15% off.In addition,you have a coupon for 100 pesos off in any i
Ilia_Sergeevich [38]

Answer:

f(x) = 0.85x

g(x) = 0.85x - 100

Step-by-step explanation:

Given that :

Sale price = 15% off the item price

Let original price = x

Hence, sale price = (100 - 15)%

Let the sale price function = f(x)

f(x) = 0.85x

Where, x = price before 15% off

Customer also has a coupon discount of 100 pesos

Let coupon discount price = g(x)

g(x) = f(x) - 100

Hence,

g(x) = 0.85x - 100

x = price before 15% off

6 0
3 years ago
Write your solution as an inequality: If 3
inysia [295]

Answer:

3

Step-by-step explanation:

if the inequality is 3, it will be 3

8 0
3 years ago
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