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antoniya [11.8K]
3 years ago
6

6. Solve the following system of equations

Mathematics
2 answers:
Setler79 [48]3 years ago
3 0
The answer is A. you basically just plug the numbers in and see which one is correct.
JulijaS [17]3 years ago
3 0

Answer:

A, x=-1, y=4

Step-by-step explanation:

First off you have to get rid of the y, so you have to multiply the the whole first equation by 5, and the whole second equation by 3, and then you can add your ys together and get 0 and you want to add both of the equations together. it will leave you with 34x=-34 so x=-1. take the first equation and plug in the answer you got, so it should be -5+3y=7, add 5 to both sides and then you will get 3y=12 divide that by 3 and you have y=4. So the answer is x=-1, y=4

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4) 8(-2 + 2n) + 3n = 40 +5n
Nikitich [7]

Answer:

use the distributive property to distribute the 8

-16+16n+3n=40+5n

-16+19n=40+5n

-16=40+5n-19n

-16=40-14n

-14n+40= -16

-14n= -16-40

-14n= -56

n= -56/-14

n= 4

5 0
3 years ago
Read 2 more answers
A jet plane can carry up to 200,000 liters of fuel. It used 130,000 liters of fuel during a flight. What percentage of the fuel
-Dominant- [34]

Given:

Capacity of jet plane = 200,000 liters of fuel

Fuel used during flight = 130,000 liters

To find:

The percentage of the fuel capacity it uses on this flight.

Solution:

According to the question, we need to find 130,000 is what percent of 200,000.

\text{Required percentage}=\dfrac{\text{Fuel used during flight}}{\text{Capacity of jet plane}}\times 100

\text{Required percentage}=\dfrac{130000}{200000}\times 100

\text{Required percentage}=65

Therefore, the jet plane uses 65 percent of fuel capacity during flight.

6 0
3 years ago
Which graph correctly compares the volumes, V, of rectangular pyramids with different heights, h, when their bases all have the
VARVARA [1.3K]

Answer:the correct answer is D

Step-by-step explanation:

Hope this help but can you tell me what your answer?

8 0
3 years ago
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The distance from Fort Worth to Fresno is 1,530 miles. If a cyclist maintains an average speed of 17 miles per hour, how many ho
Tju [1.3M]

The time take for the cyclist to travel from Fort Worth to Fresno is 90 \ hours

Explanation:

It is given that the distance from Fort Worth to Fresno is 1,530 miles.

The average speed of the cyclist is 17 miles per hour.

The time travelled by the cyclist can be determined using the formula,

Distance=Speed \times Time

Substituting the value of distance and speed, we get,

1530=17\times Time

Dividing both sides by 17, we get,

90 =Time

Thus, the time take for the cyclist to travel from Fort Worth to Fresno is 90 \ hours

3 0
4 years ago
The price of a 5-minute phone call is $1.75. What is the price of a 12-minute phone call?
Ksju [112]

Answer:

$4.20

Step-by-step explanation:

you first do 1.75 divided by 5 which gives you .35

so you do .35 times 12 which gives you 4.2

6 0
3 years ago
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