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vladimir2022 [97]
3 years ago
13

Solve this problem using the substitution method 2y-1/2y=2

Mathematics
1 answer:
stealth61 [152]3 years ago
6 0

Answer:

y=3/2and x =2

Step-by-step explanation:

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On a boat ride tour there are half as many children as there are adults. There are 30 people on the tour. How many children are
xenn [34]
Total number of people on boat=30
Half as many children as adults means:
Number of children = 1/2 ( Adults)
Let number of adults= A
Then equation is:
A+ \frac{1}{2}A = 30 \\
Multiply \ both \ sides \ by \ 2. \\
2A+A=60 \\
3A=60 \\
A=20 \\ 
So number of children= 1/2 x 20 =10

Answer: 10 Children
8 0
3 years ago
A rectangular pool 18 meters by 12 meters is surrounded by a walkway of width x
vesna_86 [32]

Answer:

x=3 meters

Step-by-step explanation:

step 1

Find the area of the rectangular pool

A=LW

we have

L=18\ m\\W=12\ m

substitute

A=18(12)=216\ m^2

step 2

Find the area of rectangular pool including the area of the walkway

Let

x ----> the width of the walkway

we have

L=(18+2x)\ m\\W=(12+2x)\ m

substitute

A=(18+2x)(12+2x)

step 3

Find the area of the walkway

To find out the area of the walkway subtract the area of the pool from the area of rectangular pool including the area of the walkway

so

A=(18+2x)(12+2x)-216

step 4

Find the value of x if the area of the walkway equal the area of the pool

so

(18+2x)(12+2x)-216=216

Solve for x

(18+2x)(12+2x)=432\\216+36x+24x+4x^{2}=432\\4x^{2} +60x-216=0

Solve the quadratic equation by graphing

The solution is x=3 meters

see the attached figure

8 0
3 years ago
If you go out to eat with 3 friends and your meal was $72.50, what should you leave for gratuninty if you want to tip your waite
kvv77 [185]

Answer:

$10.88 or round up to $11

Step-by-step explanation:

Since 15 is expressed as a percent, you can convert it to a decimal.

.15, which can also be 15/100 if you were to write it as a fraction.

You are trying to find 15% of 72.50 so you would need to multiply your new decimal (.15) to your meal total. This will give you 10.875 or 10.88.

5 0
3 years ago
Undistribute 4x - 18
dolphi86 [110]

Answer:

2(2x) - 2(9)

Step-by-step explanation:

this equation could've been distributed many different ways but this is the easiest way I can think of to undistribute this problem. I have never heard of undistributeing a problem either so that must be something knew they are teaching kids.

4 0
3 years ago
I NEED THE ANSWER ITS DUE SOON !!! Points will be rewarded
DENIUS [597]

Answer:

Jaden added instead of subtracting 23 and 5

Step-by-step explanation:

3 0
3 years ago
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