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2 years ago

Solve the system of equations algebraically: y = x+5 y = -2x

Mathematics

2 answers:

Verizon [17]2 years ago

4 0

Answer:

x = -5/3

y = 10/3

Step-by-step explanation:

y = x+5

y = -2x

y = x+5

-2x = x + 5

-3x = 5

x = -5/3

y = x+5

y = -5/3 + 5

y = 10/3

Mashutka [201]2 years ago

3 0

Answer: X= -5/3
-2x=x+5
-3x=5
X=-3/5

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What is the average rate of change for ƒ(x) = −3x + 79 over the interval 2 ≤ x ≤ 4?

Ainat [17]

Answer:

The average rate of change is -3.

Step-by-step explanation:

Given : Function $f(x)=-3x+79$ over the interval 2 ≤ x ≤ 4.

To find : What is the average rate of change ?

Solution :

Function $f(x)=-3x+79$ over [2,4]

The rate of change is the slope of the line,

So, $\text{Rate of change}=\frac{f(4)-f(2)}{4-2}$

$f(4)=-3(4)+79$

$f(4)=-12+79$

$f(4)=67$

$f(2)=-3(2)+79$

$f(2)=-6+79$

$f(2)=73$

Substitute,

$\text{Rate of change}=\frac{67-73}{4-2}$

$\text{Rate of change}=\frac{-6}{2}$

$\text{Rate of change}=-3$

Therefore, The average rate of change is -3.

8 0

2 years ago

Read 2 more answers

4/7 divided by 1 3/4

poizon [28]

Answer:

16/49

Step-by-step explanation:

4/7 ÷ 1 3/4

Convert 1 3/4 into an improper fraction

4/7 ÷ 7/4

Find the reciprocal of 7/4 and multiply

4/7 * 4/7

16/49

Hope this helps :)

7 0

2 years ago

Ashley wants to find out how much money she has in her piggy bank. She has x number of quarters and y number of dimes and says t

patriot [66]

Amount from dimes would be: 0.1y
Amount from quarters = 0.25x

So, total amount = 0.25x + 0.1y

So, she is not correct

Hope this helps!

5 0

2 years ago

ali goes for cycle ride. he starts at 3pm . he finished at 5 38pm .he has a total of 25 minutes rest during the ride. how long h

nordsb [41]

Answer:

two hours and thirteen minutes.

Step-by-step explanation:

count up from 3pm to 5pm to start with. That gives you two hours

we already have 38 minutes, now just subtract the 25 minutes he spent resting.

That leaves you with 2 hours and 13 minutes.

Correct me if I'm wrong I'm currently responding to this at a major lack of sleep lol

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1 year ago

What percent of 280 is 67.2

Fiesta28 [93]

Answer:

Step-by-step explanation:

percent of 280 is 67.2

280×y/100=67.2

280y/100=67.2

2.8y=67.2

divide by 2.8

y=24

verify

280×24/100=67.2

6720/100=67.2

67.2=67.2

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3 years ago