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3 years ago

Find the value of X and Y for all three questions. Show your work. Will give brainliest!

Mathematics

2 answers:

Reil [10]3 years ago

5 0

X=8 y=11 for the question 13

vodka [1.7K]3 years ago

3 0

Answer:

(13)

x= 8

y=11

(14)

x= 20

y=20.75

(15)

x=9

y=13

Step-by-step explanation:

(13) 8x-1 = 11x -25

24=3x

x= 8

8(8)-1 +15y-48= 180

15y=165

y=11

(14) 7x-44 + 4x + 4= 180

11x= 220

x= 20

4(20)+4+39= 8y-43

123=8y-43

166=8y

y=20.75

(15) 12x+1=15x-26

3x=27

x=9

28+15(9)-26+4y-9=180

4y=52

y=13

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fgiga [73]

The answer for your question is 6/8

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3 years ago

Two boys decided to buy a computer. The second boy had 5 6 of the money the first had. The first boy had 7 8 of the price of the

sdas [7]

Answer: The price for the computer = $1152

Step-by-step explanation:

Let the first boy = F

Let the second boy = S

Let the price of computer = C

The second boy had 5/ 6 of the money the first had. I.e

S = 5/6 F

Then F = 6/5S ......(1)

The first boy had 7 /8 of the price of the computer. That is

F = 7/8C ....... (2)

Substitute F in (1) into (2)

6/5S = 7/8C

S = 5/6 × 7/8C

S = 35/48C ......(3)

Together they had $696.00 more than they need to pay. That is

F + S = C + 696 ........ (4)

Substitute equation 2 and 3 into 4

7/8C + 35/48C = C + 696

0.875C + 0.729C = C + 696

0.604C = 696

C = 696/0.604

C = 1152 dollars

Therefore, the price for the computer = $1152

7 0

3 years ago

Read 2 more answers

HELP PHOTO INCLUDED URGENT Please

LUCKY_DIMON [66]

Lola is incorrect because the width is half of the length as stated before.

4 0

3 years ago

Please help A) x= -4 and 4 B) x=4 and 6 C) x=2 and 8 D) no solution

Neporo4naja [7]

Answer:

No solutions

Step-by-step explanation:

|-2x-10| + 4 = 2

Subtract 4 from each side

|-2x-10| + 4-4 = 2-4

|-2x-10| = -2

The absolute value is negative so there are no solutions.

Absolute values are always positive, so they cannot be negative.

4 0

3 years ago

Find the average speed of car if it travels 18km in 20 minutes.

Lena [83]

Answer:

$\boxed{\sf Average \ Speed = 54\ km/hr}$

Step-by-step explanation:

Given:

Distance = S = 18 km

Time = t = 20 min = 20/60 = 0.33 hours

Required:

Average Speed = <v> = ?

Formula:

Average Speed = Total Distance Covered / Total Time Taken

Solution:

A . S = 18 / 0.33

A.S = 54 km/hr

3 0

3 years ago

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