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3 years ago

14

I am a parent needing guidance on this paper. I am thinking I can get to the answer but not sure how to explain and answer it to

where they will understand it.

1 answer:

Finger [1]3 years ago

7 0

Answer:

Step-by-step explanation:

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Julio joined an athletic club. There was a one-time fee of $49.95 to join the club, plus a monthly fee of $24.95. Julio has paid

Rama09 [41]

c (cost)
m (month)

c= xm + b

$424.20= 24.95m+ $49.95

Move everything except variable on one side.

424.20 - 49.95 = $374.24

$374.25 = 24.95m

Divide by 24.95

m = 15

15 Months

3 0

3 years ago

Rowan baked 17 chocolate chip cookies and 9 sugar cookies for her class how many cookies does she have left

frez [133]

Answer: She has 8 cookies left

Step-by-step explanation:

17-9=8

6 0

2 years ago

The sum of two numbers is 48 and the difference is 4. what are the numbers?

alexandr1967 [171]

Answer:

22 and 26

Step-by-step explanation:

48-4= 44

44÷2= 22 (first no.)

22+4= 26 (second no.)

5 0

3 years ago

A fisherman traveled in a boat from point N upstream. After having traveled 6 km, he stopped rowing and 2 hour 40 min after firs

Nat2105 [25]

Answer:

The speed of the river's current is 4.5 km/hr.

Step-by-step explanation:

Given : A fisherman traveled in a boat from point N upstream.

After having traveled 6 km, he stopped rowing and 2 hour 40 min after first leaving N, he was brought back to N by the current.

Knowing that the speed of the boat in still water is 9 km/hour

To find : The speed of the river’s current.

Solution :

Let the speed of current = x km/h

Speed of boat = 9 km/h

Thus, the speed in upstream = (9 - x) km/h

Also, the speed in downstream = x km/h (because the boat is stationary in downstream)

Total distance = 6 km ( from N to the point he reached )

Total time = 2 hours 40 minutes

$\text{2 hours 40 minutes}=2\frac{40}{60}=2 \frac{2}{3} \\\\\text{2 hours 40 minutes}=\frac{8}{3} \text{ hours}$

We know, $\text{Time} = \frac{\text{Distance}}{\text{Speed}}$

According to the question,

$\frac{6}{9-x}+\frac{6}{x}=\frac{8}{3}$

Taking LCM and 6 common

$6[\frac{x+9-x}{(9-x)x}]=\frac{8}{3}$

Take 6 to another side,

$\frac{9}{9x-x^2}=\frac{8}{3\times 6}$

Cross multiply,

$9\times 18=8\times(9x-x^2)$

$162=72x-8x^2$

Taking 4 common and cancel out

$4x^2-36x+81=0$

Solve quadratic equation by middle term split,

$4x^2-18x-18x+81=0$

$2x(2x-9)-9(2x-9)=0$

$(2x-9)(2x-9)=0$

$\Rightarrow 2x-9=0$

$\Rightarrow x=\frac{9}{2}=4.5$

Therefore, The speed of the river's current is 4.5 km/hr.

6 0

3 years ago

Can anyone check my answers for both 7 and 8. I will give Brainliest Answer.

sashaice [31]

yes your correct!!!

6 0

3 years ago