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ehidna [41]
3 years ago
7

Suppose x = 7 is a solution to the equation 4x − 2(x + a) = 8. Find the value of a that makes the equation true. A: 2 B: 3 C: -2

5 D: 6
Mathematics
1 answer:
notsponge [240]3 years ago
7 0

if x =7 then plug in 7 for x

4(7) - 2((7)+a) = 8

28 - 14 -2a = 8

14 - 2a = 8

-2a = -6

a = 3

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A class of 40 students elected a class president. There were 12 votes for Candidate A, and 18 votes for Candidate B.
Helen [10]
Hey there, Bulgogi!

The correct answer will be the first one since [I'm assuming] you know that to calculate the percentage of something, it's the amount of that something divided by the total amount but since only 30 students voted [12+18] multiplied by 100.

So, we are calculating the percentage on votes and 12 students voted for Candidate A so our Numerator will be 12 and our Denominator will be the total amount of student who voted, so 30 [or 12+18]

Once put into a fraction, we will get \frac{12}{12+18} which would be equals to 2/5 or 0.4. Now we multiply by 100 and we get a total of 40% for Candidate A.

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4 0
3 years ago
3/6 + 1/2 what is the answer.​
Simora [160]

Answer:

reduce 3/6 to lowest terms which would be, 1/2 because 3 goes into 3 once and 3 goes into 6 twice.  

Making your equation simplified to

1/2 + 1/2

which is equal to 1

1/2 + 1/2 = 1

Step-by-step explanation:

Hope this helps! Have a fantastic day and please mark brainliest

4 0
3 years ago
Read 2 more answers
Jeremiah ran 5.6 miles every day for<br> 2 weeks. How many miles did he run<br> in all?
chubhunter [2.5K]

Answer:

78.4 miles

Step-by-step explanation:

Since there are 14 days in two weeks, you multiply 5.6 miles times 14 days to get 78.4 miles in total since 5.6 is how much he ran every DAY

3 0
3 years ago
Two identical number cubes are shown in the picture. The edge length of these number cubes is 3 centimeters. What is the combine
SVEN [57.7K]

Answer:

They are both identical cubes which makes it much easier.

Work out the volume for just one first.

The formula for volume is:

l x w x h

However, since it is a cube, all lengths are the same.

3 x 3 x 3 = 27

Now multiply it by 2 to get the volume of both combined:

27 x 2 = 54.

In short, your answer is  54cm 3

Hope This Helps You!

Good Luck :)

Step-by-step explanation:

8 0
3 years ago
Lin took 75 boxes of carrots and 80 boxes of potatoes to the market. She sold 68 boxes of carrots and 71 boxes of potatoes. How
Ugo [173]
16 vegetables because 75-68=7 and 80-71=9 and 9+7=16
5 0
3 years ago
Read 2 more answers
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