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antoniya [11.8K]
3 years ago
8

Solving With Substitution (FOR 10 POINTS!): y= 2x + 1 3x + y = -9

Mathematics
1 answer:
Katen [24]3 years ago
8 0

Answer:

y = 2x + 1 \\ 3x + y =  \:  - 9 \\  \\ 3x + 2x + 1 =  - 9 \\ 5x =  - 10 \\ x =  - 2 \\  \\ y = 2( - 2) + 1 \\ y =  - 3 \\ ( - 2 \: and \:  - 3)

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-6x + 14 &lt; -28<br> AND 3x + 28 &lt; 25
trasher [3.6K]

Answer:

x>7

-6x+14< -28

-14. -14

-6x<-42

÷-6 ÷-6

x<7

switch signs because we divided by a negative number

x>7

Answer: x<-1

3x+28<25

-28 -28

3x<-3

÷3 ÷3

x<-1

7 0
3 years ago
7 ab + 3xy - 5ab - xy<br>Answer​
Roman55 [17]

Answer:

Step-by-step explanation:

add like terms.

simplified it would be 2ab+2xy or 2(ab+xy)

5 0
2 years ago
The cost of $500,000 worth of 20-year term life insurance for Derek is $96.21 per month. If Derek's employer covers 85% of this
makvit [3.9K]
Alright, the first thing we should have to do is find the total cost per year of his insurance. To do that, we multiply $96.21 by the 12 months in a year to get $1154.52. This is the cost of his insurance per year.

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Lastly, to find out how much Derek pays for insurance yearly, we just need to subtract how much his boss pays ($981.342) from the total yearly cost  ($1154.52), which leaves us with $173.178, which is how much Derek pays yearly for his insurance, which should be your answer.


6 0
3 years ago
Read 2 more answers
A trucking company delivered 4,604 cubic yards of
nadezda [96]
Answer:
13,812 cubic yards of sand

step-by-step explanation:
4,604 cubic yards of gravel
4,604 • 3
13,812
6 0
3 years ago
1. Find the equation of a line passing through the points (1,-2) and (-3,10).​
liraira [26]

Answer:

Step-by-step explanation:

(1 , -2)   x₁ =1 & y₁ = -2

(-3,10)  x₂= -3 & y₂ = 10

First we need to find the slope.

\boxed{Slope = $\dfrac{y_{2}-y_{1}}{x_{2}-x_{1}}$}\boxed{Slope=\dfrac{y_{2}-y_{1}}{x_{2}-x_{1}}}

          =\dfrac{10-[-2]}{-3-1}\\\\\\=\dfrac{10+2}{-4}\\\\\\=\dfrac{12}{-4}\\\\\\= - 3

m = -3

Equation of the line: y = mx + b

y = -3x + b

To find the value of b, take one of the point and substitue in the above equaiton.

(1 , -2)

-2 = -3*1 + b

-2 = -3 + b

-2 + 3 = b

b = 1

Equation of the line:

y = -3x + 1

4 0
2 years ago
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