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kap26 [50]
3 years ago
11

PLEASE HELP!!!! 30 POINTS!!

Mathematics
1 answer:
Neporo4naja [7]3 years ago
8 0

Answer:

1. x=7 y= -1

2. x= -1 y= -4

3. x= 1 y= 1

4. x= 2 y= -1

Step-by-step explanation:

To solve these problems I used substitution. Hopefully this was helpful!:)

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It took Shane 2 hours to drive 120 miles. If she continues at this rate, how far will she travel in 4 hours and 30 minutes?
vodomira [7]

Answer:

270 miles

Step-by-step explanation:

If she drove 120 miles in 2 hours, that means she drives at 60 miles per hour. 4 hours and 30 minutes can be seen as 4.5, since 30 minutes is half an hour. So then you multiply 60 by 4.5 and get 270.

6 0
2 years ago
Hrgrgrgrhheyeyehryryryryrhryryhrhrhrhrududdyryrydy
Mazyrski [523]

Answer True

Step-by-step explanation:

It is true because you are crazy.

5 0
3 years ago
If f(x)=3x²-5x+4, then f(-2) =
igomit [66]

Answer:

Step-by-step explanation:

First let's re-write the equation:

f(x) = 3x² - 5x + 4

If f(-2). then we can re-write the equation as:

f(-2) = 3(-2)² - 5(-2) + 4

We must solve for exponent first:  (-2)² = 4

f(-2) = 3(4) - 5(-2) + 4

Then solve for multiplication:

f(-2) = 12 + 10 + 4

Finally addition:

f(-2) = 26

that means that in a function, if X = -2, then F is equal to 26

4 0
2 years ago
If the regular price of a new T-shirt is $13.
Verdich [7]

Answer: 30% of decrease

Step-by-step explanation:

$13.95 - $10 = $3.95

$13.95___100%

$3.95___x= 28.31%

(3.95*100) / 13.95 = 28.31 = 30

5 0
3 years ago
Find the perimeter of this semi-circle with radius, r = 22cm. Give your answer rounded to 1 DP.
shepuryov [24]

Answer:

69.1 cm

Step-by-step explanation:

Circumference of a circle

c = 2πr

Half of that would be a semi-circle

c = πr

c = π * 22

c = 69.115038379

Rounded

69.1 cm

3 0
3 years ago
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