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3 years ago

1.

1 answer:

5 0

First round 4 were helped then 4*4 , then 4^3 and so on .
so during the sixth round 4^6 friends were helped

4^6 = 4096

2. = 2(-2)^4 - 3(3)^3
= 2 * 16 - 3*27
= 32 - 54
= 22

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Solve the system of linear equations by substitution.

SVEN [57.7K]

Answer:

Answer:

x= 29/11 or y= 25/11

Step-by-step explanation:

2x - y= 3 ...........equation 1

x + 5y= 14 ............equation 2

Make x the subject of the formula in equation 2

x= 14 - 5y ..............equation 3

Substitute x=14 - 5y in equation 1

2(14- 5y) - y=3

28 - 10y - y=3

Collect like terms

-10y - y=3 - 28

-11y= -25

divide both sides by coefficient of y

-11y/-11 = -25/-11

y= 25/11

Substitute y= 25/11 in equation 3

x=14 - 5(25/11)

x= 14 - 125/11

x= 29/11

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

8x +5 plss helpp and ill give brainliest

mamaluj [8]

Answer:

8x + 5 = 29

I think I'm right sorry if I'm not :p

6 0

3 years ago

Carlos spent 1 1/4 hours doing his math homework. He spent 1/4 of this time practicing his multiplication facts.

olganol [36]

Carlos spent 15 minutes practicing his multiplication facts.

Explanation:
An hour is 60 minutes, Carlos practiced his multiplication facts for 1/4 of an hour.

First you must do 60 divided by 4 which is 15. 1/4 of an hour is 15 minutes.

7 0

4 years ago

Read 2 more answers

2/3(18x - 12) = 7 – 3(x –3)

julsineya [31]

Answer:

x=8/5

Step-by-step explanation:

2/3(18x-12)=7-3(x-3)

2/3(18x-12)=7-3x+9

12x-8=-3x+16

12x-(-3x)-8=16

12x+3x-8=16

15x-8=16

15x=16+8

15x=24

x=24/15

simplify

x=8/5

7 0

4 years ago

an art dealer makes a 17.5% commission on every painting sold. If a painting sold for $1500, what was the commission

Aleksandr [31]

A percentage is a number out of 100. So, 17.5% is really 17.5/100, or 0.175.

To find 17.5% of 1500, you multiply 1500 by 0.175

1500 x 0.175 = 262.5.

The commission is $262.50.

4 0

4 years ago