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Mariana [72]
3 years ago
12

Which is the most reasonable estimate for 30% of 72?

Mathematics
1 answer:
leva [86]3 years ago
5 0

Answer:

It is 21. Hope it helped!

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Max is scuba diving at elevation of -64.5 feet, when friend signals to come higher. Max makes 2 ascents, each an equal distance
KengaRu [80]

Answer: - 42.95 feet

Explanation:

Let each ascent be x. Thus,

2 equal ascents = 2x

From the information given,

initial position = - 64.5 feet

Final position after 2 ascents = - 21.4 feet

This means that

- 64.5 + 2x = - 21.4

2x = - 21.4 + 64.5

2x = 43.1

x = 43.1/2

x = 21.55

Thus, Max's elevation after the first ascent is

- 64.5 + 21.55

= - 42.95 feet

4 0
1 year ago
A = √7 + √c and b = √63 + √d where c and d are positive integers.
mrs_skeptik [129]

Answer:

\displaystyle a:b=\frac{1}{3}

Step-by-step explanation:

<u>Ratios </u>

We are given the following relations:

a=\sqrt{7}+\sqrt{c}\qquad \qquad[1]

b=\sqrt{63}+\sqrt{d}\qquad \qquad[2]

\displaystyle \frac{c}{d}=\frac{1}{9} \qquad \qquad [3]

From [3]:

9c=d

Replacing into [2]:

b=\sqrt{63}+\sqrt{9c}

We can express 63=9*7:

b=\sqrt{9*7}+\sqrt{9c}

Taking the square root of 9:

b=3\sqrt{7}+3\sqrt{c}

Factoring:

b=3(\sqrt{7}+\sqrt{c})

Find the ration a:b:

\displaystyle a:b=\frac{\sqrt{7}+\sqrt{c}}{3(\sqrt{7}+\sqrt{c})}

Simplifying:

\boxed{a:b=\frac{1}{3}}

3 0
3 years ago
20/35 as a fraction in simplest form
zheka24 [161]
\frac{20}{35}=\frac{4 \times 5}{7 \times 5}=\boxed{\frac{4}{7}}
7 0
3 years ago
Read 2 more answers
PLEASE HELP!! 15 POINTS!!!!
lozanna [386]
A. Is y=2x+3
B. Is y=-x+6 or in pt slope form y-5=-1 times (x-1)
C. Is (1,5) you can graph the slope intercept form equations to show your work :)
7 0
3 years ago
28 is what precent of 50
WITCHER [35]

Answer:

56%

Step-by-step explanation:

28/50=56/100

7 0
3 years ago
Read 2 more answers
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