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umka2103 [35]
3 years ago
8

What is the BEST estimate of the expression 398 divided by 9.9 times 1 5/6 plus (-22)

Mathematics
1 answer:
Anvisha [2.4K]2 years ago
4 0

Answer:

51.7037037037

Step-by-step explanation:

But estimated, probably 51.7 or 52

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A cyclist travels 20 miles in the same amount of time it takes a hiker to walk 6 miles. The rate of the cyclist is 7 mph faster
Anna11 [10]

Answer:

The speed of the cyclist is 10 miles per hour .

Step-by-step explanation:

Given as :

The distance cover by cyclist = D_1= 20 miles

The distance cover by biker =  D_2 = 6 miles

The speed of biker = S_2 = s  mph

The speed of cyclist = S_1= 7 + s  mph

The time taken by both cyclist and biker =  t hour

Now. Distance = Speed × Time

So,  D_1 =   S_1 × t

Or, 20 = s × t

Or, t = \frac{20}{7+s}             .....1

And ,

D_2 =   S_2 × t

or, 6 = s t              

Or,  t = \frac{6}{s}  ....2

From Eq  1 and 2

I.e \frac{20}{7+s} = \frac{6}{s}

Or, 20 s = 6 ( 7 + s )

Or, 20 s - 6 s = 42

Or, 14 s = 42

∴   s = \frac{42}{14}

I,e s = 3 miles per hour

So, The speed of biker = S_2 = s = 3 miles per hour

And The speed of cyclist = S_1= 7 + s = 7 + 3= 10 miles per hour

Hence The speed of the cyclist is 10 miles per hour . Answer

4 0
3 years ago
A survey found that 3 out of 100 randomly selected people have red hair. How many people in a group of 12,000 randomly selected
kirza4 [7]

Answer:

360 people out of 1200 are likely to have red hair.

Step-by-step explanation:

So I just saw that 100 x 120 equals 1200. So I just need to multiply 3 x 120 and I got 360. I think this is how to solve?

4 0
2 years ago
Evan saves $2 for every $5 he earns mowing lawns. How much will Evan have saved when he has earned $150?
Lesechka [4]

Answer:

he will have saved 45$

Step-by-step explanation:

if you take 2 from every 5 and 5 x 15 = 150, you would do 2 x 15 and get 30. So, the answer is 30$

6 0
3 years ago
Read 2 more answers
Between what two numbers would 9 be located on a number line?
Mariulka [41]

it \: is \: simple \\ between \: 8 \:  \:  \: 10

5 0
3 years ago
Read 2 more answers
Can someone plz help me?!
Fantom [35]

Well since it's a prediction, you can see that its a 6.2 to 10 ratio. or 62%. So if you get any KPH number, times it by 62% or times it by 0.62. To by MPH into KPH you multiply by roughly 1.6

Therfore A = 46.5

B =  32

8 0
3 years ago
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