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Marizza181 [45]
3 years ago
14

The side of a square is two raised to the seven halves power inches. using the area formula a = s2, determine the area of the sq

uare. a = 196 square inches a = 128 square inches a = 49 square inches a = 4 square inches
Mathematics
2 answers:
Deffense [45]3 years ago
8 0
A= 128 square inches
Hatshy [7]3 years ago
8 0
A=128 inches. this is the answer not option A. :)
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A boat on a river travels downstream between two points, 90 mi apart, in 1 h. The return trip against the current takes 2 1 2 h.
docker41 [41]

Answer:

A)63miles per hour.

B)27 miles per hour

Step-by-step explanation:

HERE IS THE COMPLETE QUESTION

boat on a river travels downstream between two points, 90 mi apart, in 1 h. The return trip against the current takes 2 1 2 h. What is the boat's speed (in still water)??b) How fast does the current in the river flow?

Let the speed of boat in still water = V(boat)

speed of current=V(current)

To calculate speed of boat downstream, we add speed of boat in still water and speed of current. This can be expressed as

[V(boat) +V(current)]

It was stated that it takes 1hour for the

boat to travels between two points of 90 mi apart downstream.

To calculate speed of boat against current, we will substact speed of current from speed of boat in still water. This can be expressed as

[V(boat) - V(current)]

and it was stated that it takes 2 1/2 for return trip against the Current

But we know but Speed= distance/time

Then if we input the stated values we have

V(boat) + V(current)]= 90/1 ---------eqn(1)

V(boat) - V(current) = 90/2.5----------eqn(2)

Adding the equations we have

V(boat) + V(current) + [V(boat) - V(current)]= 90/2.5 + 90/1

V(boat) + V(current) + V(boat) - V(current)]=90+36

2V(boat)= 126

V(boat)=63miles per hour.

Hence, Therefore, the speed of boat in still water is 63 miles per hour.

?b) How fast does the current in the river flow?

the speed of the current in the river, we can be calculated if we input V(boat)=63miles per hour. Into eqn(1)

V(boat) + V(current)]= 90/1

63+V(current)=90

V(current)= 27 miles per hour

Hence,Therefore, the speed of current is 27 miles per hour.

7 0
3 years ago
Jon has y stickers. He uses 20 stickers and divided the remainder equally between his two sisters. find the number of stickers e
ale4655 [162]
Jon has y stickers and uses 20
jon=y-20
the sisters share y-20 between 2 of them
therefore each sister receives

(y-20) divided by 2 -- (y-20)/2

6 0
3 years ago
Help snsnsnansnsnsnsns
N76 [4]

Answer:

answer is 420-69

Step-by-step explanation:

because those numbers are great

8 0
2 years ago
9) p(a) = a) – 3a; Find p(-2)<br> A) 18<br> B) 198<br> C) -110<br> D) -2
Afina-wow [57]
ANSWER: B)198



Have a great day!
6 0
2 years ago
A construction crew is lengthening a road. The road started with a length of 59 miles, and the crew is adding 3 miles to the roa
AlekseyPX

L = total length

D = number of days

they add 3 miles per day which = 3D

equation:  L = 59 +3D

 if they worked for 34 days, replace D with 34 to get:

L = 59 +3(34) =

L=59 + 102

L=161 miles total length after 34 days

5 0
3 years ago
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