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belka [17]
3 years ago
8

a boat traveled 210 miles downstream and back.the trip downstream took 10 hous.the trip back took 70hours.what is the speed of t

he boat in still water.what is the speed of the current
Mathematics
1 answer:
Lady_Fox [76]3 years ago
3 0
The boat rates are 21 mph and 3 mph.
to find the speed you rate times time equals the distance.
so you do,

10 × r = 210
the speed equals 21mph

70 × r = 210
the speed equals 3mph

my guess is the boat is going 21 mph and the current is 3 mph
Hope this helps
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Y=2x-7<br> y=-3x+18 <br> solve by substitution
Liono4ka [1.6K]

Answer:

-x+11

Step-by-step explanation:

am not sure if this is correct but

2x-3x=-x

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8 0
2 years ago
_ 2. (6 x 4)+ (6 x 11) = 6 x (4 + 11)<br> What is the property of this equation?
laiz [17]

Answer:

Distributive Property

Step-by-step explanation:

The distributive property of multiplication over addition can be used when you multiply a number by a sum.

4 0
3 years ago
Please i need help i’ll give u a brainliest please
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Answer:

V=314.15

Step-by-step explanation:

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4 0
2 years ago
Approximate the zeros of the function. Round to the nearest tenth if necessary. f(x) = 4x^2 + 4x - 35. Explain each step on how
svet-max [94.6K]
4x²+4x-35=0
factor: (2x+7)(2x-5)=0
2x+7=0, or 2x-5=0
2x=-7 or 2x=5
x=-3.5 or x=2.5

I don't see any rounding necessary in this case. 

when you factor ax²+bx+c, you take the two factors of a and the two factors of c, one factor of a times one factor of c, the other factor of a times the other factors, the sum of the two products make b.
in this case, the factors of 4 is 2 and 2, the factors of -35 is -5 and 7. I line them up in the following way:
2    -5

2      7
then I multiple them diagonally, the top left 2 multiplying the bottom right 7=14, and the other 2 multiplying -5=-10, 14 and -10 make a sum of 4.

if you don't get the desired sum, switch the factors up and down till you have the right combination. Note: Do not switch left and right. 

I hope this makes sense to you.
8 0
3 years ago
Find the distance between -4.3 and 0.8 on a number line as a decimal
evablogger [386]

Answer:

5.1

Step-by-step explanation:

Add 4.3 to 0.8

6 0
3 years ago
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