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RUDIKE [14]
3 years ago
5

Solve the following: a) 4x=1 = x +7 b) 3x+2 = 2x + 13

Mathematics
1 answer:
Yuliya22 [10]3 years ago
5 0
A) x=2; i’m guessing if you meant by 4x+1=x+7
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A truck was driven a 140 miles in 3 1/2 hours. If a car is driven the same distance at an average speed of 20 miles an hour fast
densk [106]

Find the speed of the truck:

140 miles / 3.5 hours = 40 miles per hour

The car was 20 miles an hour faster: 40 + 20 = 60 miles per hour.

Divide distance by speed: 140 miles / 60 miles per hour = 2 1/3 hours

Answer: 2 1/3 hours

8 0
3 years ago
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Danny and Mark and Evans ages combined is 80. What was there combined age three years ago?
Tasya [4]

Since there are three kids, 3x3=9. 80-9=71.  Danny and Mark and Evans ages combined is 71 years
8 0
3 years ago
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7. for normal situations, the minimum speed limit throughout the u.s. interstate highway system is 72 km/hr which is 45 miles pe
gladu [14]

Answer:

Question 7: Distance = 237.6 km

Question 8: Distance = 399.3 km

Step-by-step explanation:

Question 7:

Given:

Minimum speed (s) = 72 km/hr

Time taken (t) = 3.3 hours.

We know that, distance traveled is equal to the product of speed and time.

Therefore using distance formula, we get:

Distance = Minimum speed × Time

Distance = s\times t

Distance = 72\times 3.3 = 237.6\ km

Therefore, distance traveled at this speed is 237.6 km.

Question 8:

Maximum speed (S) = 121 km/hr

Time taken (T) = 3.3 hours.

We know that, distance traveled is equal to the product of speed and time.

Therefore using distance formula, we get:

Distance = Maximum speed × Time

Distance = S\times T

Distance = 121\times 3.3 = 399.3\ km

Therefore, distance traveled at this speed is 399.3 km.

3 0
3 years ago
100-99+98-97+96-95...2-1=
Simora [160]
100-99=1+98=99-97=2+96=98-95=3
2-1=1
5 0
3 years ago
How to solve problems on this website
-BARSIC- [3]

Answer:

You go to whoever's question you wanna answer and it should say "add answer" and just type out your answer and solve it

4 0
3 years ago
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