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expeople1 [14]
3 years ago
13

Rebekah answered 42 of the 60 questions correctly on a test

Mathematics
1 answer:
aleksley [76]3 years ago
8 0

Answer:

70%

Step-by-step explanation:

42 divided by 60 times 100

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PLEASE HELP!!!!!! I need help on this problem
Thepotemich [5.8K]

Answer:

185 minutes.

Step-by-step explanation:

It is possible to model an equation for this, such that

0.10x + 14.80 = 0.08x + 18.50

where x represents the number of minutes.

Then, you solve for x:

0.10x + 14.80 = 0.08x + 18.50 \\ 0.02x = 3.70 \\ x =  \frac{3.70}{ 0.02}  \\ x = 185

5 0
3 years ago
A train travels 250 km with a average speed of 75 km/hr and 350 km with 70km/hr and 200 km with average speed of 30km/hr. What w
pentagon [3]

Answer:

53 1/3 km/h

Step-by-step explanation:

average speed = (total distance)/(total time)

average speed = distance/time

time * average speed = distance

time = distance/(average speed)

250 km at 75 km/h

distance = 250 km

time = (250 km)/(75 km/h) = 3.33333... hours

350 km at 70 km/h

distance = 350 km

time = (350 km)/(70 km/h) = 5 hours

200 km at 30 km/h

distance = 200 km

time = (200 km)/(30 km/h) = 6.6666...  hour

total distance = 250 km + 350 km + 200 km = 800 km

total time = 3.33333... hours + 5 hours + 6.66666... hours = 15 hours

average speed = (total distance)/(total time)

average speed = (800 km)/(15 hours)

average speed = 53 1/3 km/h

3 0
2 years ago
Find the number of unique permutations of the word ALGEBRA.
iVinArrow [24]

Answer:

= 2520

Step-by-step explanation:

In 2520 distinct way the letter "ALGEBRA " can be Arranged

I think it's the answer

4 0
2 years ago
Hi guys i need help with this problem y=mx+b
saveliy_v [14]
Y = how far up

x = how far along

m = Slope or Gradient (how steep the line is)

b = value of y when x=0

How do you find "m" and "b"?

b is easy: just see where the line crosses the Y axis.
m (the Slope) needs some calculation:
m = Change in Y/change in X
7 0
3 years ago
What is 136 sq km divided by 8 km?
Allushta [10]
136 sq km ÷8km is 17, because 8 in 136 can go into 13 once and 13 -8 =5 , thdn you bring down the 6 and 56 ÷8=7 so its 17
5 0
3 years ago
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