2 years ago

Please help!!!! thanks

Mathematics

1 answer:

g100num [7]2 years ago

5 0

B. 2a -21 = 1

2/3 a -7 = 1/3

Multiply through by 3

(2/3 a)(3) -(7x3) = 1/3 x 3

2a - 21 = 1

You might be interested in

Every week malik spends 5 2/15 hours doing his math homework and 2 13/30 hours doing his science homework. Estimate how much mor

ArbitrLikvidat [17]

This is Simple, Just Subtract Time taken by Science homework from time taken by Maths homework..

$= 5 \frac{2}{15} - 2 \frac{13}{30} \\ = \frac{150}{15} - \frac{73}{30} \\ = \frac{300 - 73}{30} \\ = \frac{227}{30} \\ = 7 \frac{17}{30} \: hours \: more.$

!! Hope It Helps !!

3 0

3 years ago

Alejandra Plans to sew fringe on a scarf. The scarf is shaped like a rectangle. The length of the scarf is 48 inches. The width

tankabanditka [31]

Answer:

1152 inches of fringe

Step-by-step explanation:

l multiplies with width to get the area so

w is one half of 48 which 24

so 24x48 which is 1152 inches of fringe

5 0

3 years ago

Sunny’s Surf Shop sold 20 surfboards last week. This week, they will sell 320 percent as many. How many surfboards will Sunny’s

stealth61 [152]

Multiplying 20 by 320% is the same thing as multiplying 20 by 3.2, or 20(3.2)=64. Hope this helped!

7 0

4 years ago

Read 2 more answers

I’ll give brainliest

Hoochie [10]

Answer:

Step-by-step explanation:

P of red or green = (40 red+ 10 green)/ (40 red +50 yellow+10 green)

= 50/ 100= 1/2

7 0

3 years ago

The mean length of time, per week, that students at a certain school spend on their homework is 24.3 hours, with a standard devi

bixtya [17]

Answer:

21.1%

Step-by-step explanation:

(25 - 24.3) / 1.2 = 0.5833 z score = 78.9%

You need the percent that spend more than 25 hrs per week, so 100 - 78.9 = 21.1%

4 0

3 years ago