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Reil [10]
3 years ago
5

Rachel mows 5 lawns in 8 hours. At this rate how many lawns can she mow in 40 hour?

Mathematics
1 answer:
posledela3 years ago
5 0

We can think of this as an equality

5 Lawns = 8 Hours

If she needs 40 hours, you can multiply 8 hours by 5 to get 40, but now it's not balanced. So, you need to multiply 5 to the other side too so:

5 x (5) = 8 x (5)

Therefore she mows 25 Lawns in 40 Hours

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You can jog around the block twice and the park once in 10 min. You can jog around the block twice and the park 3 times in 22 mi
stich3 [128]
B = block     p = park

2b + p = 10 min                2 runs around the block takes 10 minutes
2b + 3p = 22 min        2 runs around the block plus 3 runs around the park                                                       takes 22 minutes

To solve, I will use substitution. First, I will divide the first equation by 2 to get b by itself and subtract p from both sides to get b by itself. Then, substitute 5 - 1/2p in for b in the second equation because they have equal values. Then, subtract 10 from both sides to eliminate it. Divide by 2 to both sides to get 'p' by itself.

2b + p = 10 min ---------→b + 1/2p = 5 ----------→ b = 5 - 1/2p

2(5 - 1/2p) + 3p = 22 ---------→ 10 -p + 3p = 22 --------→ 10 + 2p = 22

10 + 3p = 22 ----------→ 2p = 12

2p = 12 -------------→ p = 6

It takes 6 minutes to jog around the park

Hope this helps!
6 0
3 years ago
Jessica has square picture with an area of 900 square inches how long is each side of the picture
frosja888 [35]

Answer: 225

Step-by-step explanation: If the whole area is 900 square inches you divide by the sides of the square 4 and divide by the total area 900. 900/4 = 225

4 0
3 years ago
What is a line graph
8090 [49]

Answer:

A graph with points connected by lines to show how something changes in value:

• as time goes by,

• or as something else changes.

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Question 9 of 10
Sophie [7]

Answer:

d

Step-by-step explanation:

its a triangle all sides are equal. so it would be d-60 degrees

8 0
3 years ago
R= m/2 (c + K) for k
Wewaii [24]

Answer:

                  \bold{K=\frac{2r}m-c=\frac{2r-cm}m}

Step-by-step explanation:

\bold{r= \frac m2 (c + K)}\\^{\div\frac m2}\qquad^{\div\frac m2}\\ \bold{r\cdot\frac2m=c+K}\\{}\ ^{-c}\qquad^{-c}\\\bold{\frac{2r}m-c=K}

Or if you mean r= m/[2(c + K)]

\bold{\quad r\ =\ \frac m{ 2(c + K)}}\\^{\cdot(c+K)}\quad^{\cdot(c+K)}\\ \bold{r(c+K)=\frac m2}\\{}\qquad ^{\div r}\qquad^{\div r}\\\bold{c+K=\frac m2\cdot\frac1r}\\{}\quad^{-c}\qquad^{-c}\\\bold{K=\frac m{2r}-c}

5 0
3 years ago
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