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Vladimir [108]
3 years ago
15

I keep getting this wrong can y’all help me please

Mathematics
1 answer:
DENIUS [597]3 years ago
8 0

Answer:

If n is three,

-2n(5+n-8-3n)

-2*3 (5+3-8-3*3)

-6(0-9)

-6*-9

54

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2x(x)=5<br> I need help
zhuklara [117]

Step-by-step explanation:

X interprets (0,0), (-5, 0) all you must do is divide 5 by 2 so 5÷2=2.5 that is your answer

6 0
3 years ago
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
a man retires at age 50 with $625,000 in savings.after 7 years of retirement, he has spent $259,000 of his savings and is consid
vaieri [72.5K]
Im not entirely sure what you are looking for, but if you are trying to find out how much he has left, you would take 625,000-259,000=366,000

He would have $366,000 left from his retirement.

Hope this helps! :)
3 0
3 years ago
A new health drink has ​% of the recommended daily allowance​ (RDA) for a certain vitamin. The RDA for this vitamin is mg. How m
Aleksandr-060686 [28]

Answer:

git to be honest with you i dont know

Step-by-step explanation:

6 0
3 years ago
Which expression is equivalent to (2^1/2 2^3/4)^2
dimaraw [331]

Answer:

\sqrt{2^5}

Step-by-step explanation:

2^{1/2} × 2^{3/4} = 2^{5/4}

(2^{5/4})² = 2^{5/2} = \sqrt{2^5}

6 0
3 years ago
Read 2 more answers
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