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antiseptic1488 [7]
3 years ago
12

Solve this system of equations. x-y=2 2.5x + y =5

Mathematics
1 answer:
aev [14]3 years ago
5 0

Answer:

x=2, y=0. (2, 0).

Step-by-step explanation:

x-y=2

2.5x+y=5

---------------

x=y+2

2.5(y+2)+y=5

2.5y+5+y=5

3.5y=5-5

3.5y=0

y=0/3.5

y=0

x=0+2=2

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Jessie has a piece of wood that is 8 feet long. he needs to cut pieces that are 7/8 of a foot long. how many pieces will he b ab
Nastasia [14]
Hello
You divide 8 by 7/8 you get <span><span>
9 1/7
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3 0
3 years ago
Read 2 more answers
samantha threw an apple out of a window from the tenth floor of her appartment building. the equation y = -16t^2+120 can be used
ella [17]
Answer:
time taken = 2.74 seconds

Explanation:
We are given that:
y = -16t² + 120 models the situation where:
y is the floor number
t is the time taken for the apple to hit the ground

We are also given that the floor number (y) is 10. Therefore, all we have to do is substitute with y in the above equation and solve for the time t as follows:
y = -16t² + 120
10 = -16t² + 120
120 - 10 = 16t² 
110 = 16t²
t² = 110/16
t² = 6.875
either t = 2.74 seconds ..........> accepted
or t = -2.74 seconds .........> rejected as time cannot be in negative

Hope this helps :)
5 0
3 years ago
3. Mr. James told Jill he would charge her $15 per hour, plus parts, to fix her bicycle.
ad-work [718]

Answer:

512

Solution:

so first you multiply 15 times 32 and get 480 than you add 32 and get 512.

7 0
3 years ago
At what rate is the temperature decreasing?
Murljashka [212]

Answer:

8 celcius

Step-by-step explanation:

The slope is -8 so it is decreasing by 8

5 0
2 years ago
Read 2 more answers
The ratio of jumps to falls for ice skater Rhonda is 4 falls to every 15 jumps. At this rate, how many times will she not fall i
Inessa05 [86]

<u>Answer:</u>

Rhonda will not fall 264 times in 360 jumps.

<u>Solution:</u>

Given, The ratio of jumps to falls for ice skater Rhonda is 4 falls to every 15 jumps.  

We have to find At this rate, how many times will she not fall in 360 jumps.

Now,  

For 15 jumps → 4 falls

For 360 jumps → n falls

Now apply Chris cross method,

15 \times n=360 \times 4 \rightarrow n=\frac{360 \times 4}{15}=24 \times 4=96

So, she falls 96 times in 360 jumps.

Then, number of times she will not fall = 360 jumps – 96 falls = 264 times.

Hence, Rhonda will not fall 264 times in 360 jumps.

8 0
3 years ago
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