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KATRIN_1 [288]
3 years ago
13

How many solutions does the system of equations have? y=4x-7 and y=4x+2

Mathematics
2 answers:
guajiro [1.7K]3 years ago
8 0

Answer:

no solution

Step-by-step explanation:

4x-7=4x+2

4x-4x=2+7

0=9

that's not true

thus no solution

Alex17521 [72]3 years ago
6 0

Answer:

no solution

Step-by-step explanation:

4x-7=4x+2

-4x +7 -4x +7

0 = 9

0 doesn't equal 9, so there is no solution.

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A bat and ball cost a dollar and ten cents. the bat costs a dollar more than the ball. how much does the ball cost?
rewona [7]
The bat would cost one dollar and five cents and the ball would cost five cents. The reason is, you have to add them together and any higher or any lower would go over the limit of one dollar and ten cents
3 0
3 years ago
Cherries $5 per pound and oranges per pound$2. He paid 18.00 for total weight which was 6 lbs how many pounds of cherries did Al
wel
Answer: 2 lbs of cherries

Cherries = $5 per pound
Oranges = $2 per pound
Total Cost = $18
Total weight = 6 lb

------------------------------------
Define x and y
------------------------------------
Let x be the number of lb of cherries
Let y be the number of lb of oranges

------------------------------------
Construct equations
------------------------------------
x + y = 6               ---------------------------- (1)
5x + 2y = 18         ---------------------------- (2)

------------------------------------------------------------------------
Solve x and y
------------------------------------------------------------------------
From equation (1):
x + y = 6 
x = 6 - y 

------------------------------------------------------------------------
Substitute x = 6 - y into equation 2
------------------------------------------------------------------------
5x + 2y = 18
5 (6 - y) + 2y = 18
30 - 5y + 2y = 18
3y = 30 - 18
3y = 12
y = 4

------------------------------------------------------------------------
Substitute y = 4 into equation (1)
------------------------------------------------------------------------
x + y = 6
x + 4 = 6
x = 2

------------------------------------------------------------------------
Find the weight of cherries and oranges
------------------------------------------------------------------------
Cherry = x = 2 lb
Oranges = y = 4 lbs 

------------------------------------------------------------------------
Answer: Alex bought 2 lb of cherries
------------------------------------------------------------------------
5 0
3 years ago
15c⁵d³/-3c²d⁷<br> help plzzzz
irina [24]

Answer:

-5c³d-⁴

Step-by-step explanation:

15÷3=5

for c and d we subtract powers that

5 0
3 years ago
How can we check the binomial factors to verify that they are truly factors? Are the factors (x + 5)(x – 8) truly factors of x2
gladu [14]
They are not. The easiest way to tell this is by multiplying the last number of each parenthesis together. This should always result in the last number in the equation. However, -8*5 does not equal -30, so these are not the true factors. 
7 0
3 years ago
Read 2 more answers
4 times the sum of a number and 3 is equal to 16​
Andru [333]

Step-by-step explanation:

x = the number

4×(x+3) = 16

x + 3 = 4

x = 1

6 0
3 years ago
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