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2 years ago

Here is a histogram showing

Mathematics

2 answers:

STatiana [176]2 years ago

6 0

Answer:

84.3%

Step-by-step explanation:

You first find the frequency. You do this by multiplying the frequency density by the class length.

VashaNatasha [74]2 years ago

4 0

Answer:70.8

Step-by-step explanation:

Add up all the values in each 5 seconds up to 30, and divide by sum of all 50 seconds of frequency density and times by 100

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An athlete ran a sprint of 100 ft in 3.1 s. At what speed was the athlete running in miles per hour? Round to the nearest mile p

nordsb [41]

Answer:

22 miles per hour

Step-by-step explanation:

we know that

The speed is the ratio of distance by the time

Let

d -----> distance in feet

t ----> time in seconds

s ----> the speed in ft/sec

$s=\frac{d}{t}$

we have

$d=100\ ft\\t=3.1\ sec$

substitute

$s=\frac{100}{3.1}$

$s=32.26\frac{ft}{sec}$

Remember that

$1\ mi=5,280\ ft$

$1\ h=3,600\ sec$

Convert ft/sec to mi/h

$s=32.26\frac{ft}{sec}=32.26\frac{(1/5,280)}{(1/3,600)}=32.26(\frac{3,600}{5,280})=22\ \frac{mi}{h}$

7 0

2 years ago

You are given this equation: 2(6x + 6)= 3(x – 4) + 5. What is the first step in solving for x? Why?

NARA [144]

Answer:

The first first in solving for x is do the distributive property to the left and right of the eqaution. Distribute 2 with 6x and 6. Distribute 3 with x and -4.

Step-by-step explanation:

PEMDAS states that you do things in the parenthesis first.

3 0

2 years ago

What is the answer to -t+9-4t=59?

kkurt [141]

Answer:

-10

Step-by-step explanation:

combine like terms -5x+9=59 subtract 9 from both side and get -5x=50 so x=-10

3 0

3 years ago

Read 2 more answers

Name the congruent sides.

olga nikolaevna [1]

The answer is B.
Hope it helps!

4 0

3 years ago

Read 2 more answers

Isabella is solving the equation 4x^2=13x-3 with the quadratic formula

laiz [17]

Answer:

x=(3,1/4)

Step-by-step explanation:

Be sure to use the formula...

$-b + or - sqrt{b^{2} - 4ac } / 2a$

- First, move all variables to one side (left) of the equation. You want one side to be equivalent to zero.

-Next, you need to find a, b, and c. This should be...

a=4

b=-13

c=3

- Knowing this, fill in these variable to go along with the formula. I cannot do this for you, as you should try it on your own. But, you should end up with the solution x= (3,1/4).

- Hope this helps! If you need a further explanation or help on any more problems please let me know, as I would be glad to help anytime.

5 0

3 years ago