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3 years ago

Tell whether the equation has one, zero, or

2 answers:

7 0

So starting with the question which is
4x-3=2x+13
All you have do is subtract 2x from 4x which is 2x
So now the equation will become
2x-3=13
Minus 3 on both sides So 2x is left over
2x=16
X=8

velikii [3]3 years ago

6 0

Answer:

One solution

Step-by-step explanation:

4x - 3 = 2x + 13

4x − 3 − 2x = 2x + 13 − 2x (subtract 2x from both sides)

2x - 3 = 13

2x − 3 + 3 = 13 + 3 (add 3 to both sides)

2x = 16

2x/2 = 16/2 (dividing 2 from both sides)

x = 8

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For each table, calculate the mean weight for each group, XA and Xb, and find the difference of the mean

anyanavicka [17]

Answer:

First Randomization

Xa = 12.5, Xb = 11.26, Xa-Xb = 1.24

Second Randomization

Xa = 11.36, Xb = 12.6, Xa-Xb = -1.24

Third Randomization

Xa = 11.98 Xb = 11.98, Xa-Xb = 0

Step-by-step explanation:

Mean is the average weight of the numbers. The formula for calculating mean is as shown:

Mean xbar = sum of numbers/Total number present.

For first randomization:

Mean of A Xa = 13.6+12.1+15.9+11.2+9.7/5

Xa = 62.5/5

Xa = 12.5

Xb = 8.2+8.2+11.5+13.8+14.6/5

Xb = 56.3/5

Xb = 11.26

Mean difference Xa - Xb = 12.5-11.26

Xa-Xb = 1.24

For second Randomization:

Xa = 8.2+13.8+15.9+9.2+9.7/5

Xa = 56.8/5

Xa = 11.36

Xb = 12.1+14.6+13.6+11.2+11.5/5

Xb = 63.0/5

Xb = 12.6

Mean Difference Xa-Xb = 11.36-12.6

Xa-Xb = -1.24

For third randomization:

Xa = 8.2+9.7+11.5+14.6+15.9/5

Xa = 59.9/5

Xa = 11.98

Xb = 12.1+13.8+13.6+11.2+9.2/5

Xb = 59.9/5

Xb = 11.98

Mean Difference Xa-Xb = 11.98-11.98

Xa-Xb = 0

6 0

3 years ago

Need help with these 4 problems

rewona [7]

Simply plug the number after the semi colon into each question's respective variable.

1. Is k=-1 a solution to this problem?
Is 9(-1)=10-(-1)?
we see that -9=10+1=11 which is not a true equality. since -9 is not 11 then "No" is the correct answer to number 1.

3.
3(-10)÷(-6)=5-(-10) ?
-30÷-6=5+10?
5=15?
No, not true, thus "No" is the correct answer.

5. 8-8=2(8)-16?
Is 0=16-16 ?
Yes!

7.
Is 2(7-2)-5(7)=5(2-7)?
2(5)-35=5(-5)?
10-35=-25
-25=-25
Bingo! Yes.

5 0

4 years ago

A developer bought 78 trees at a total cost of $4050. The shade trees cost $45 each and the evergreens cost $60 each. How many o

ANTONII [103]

Answer:

Step-by-step explanation:

for 5 feet is $60

2 feet is $150.

sorry if this doesn't help!

6 0

3 years ago

a maximum speed, and airplane travels 2460 miles against the wind in 6 hours. flying with the wind, the plane can travel the sam

Dmitry [639]

I'm assuming you want to find the wind speed.

the ground speed against the wind is 410.
2460 / 6 = 410

the ground speed against the wind is 492.
2460 / 5 = 592

the difference is 82 mph, but you need to divide by 2 because speed is being added in one direction and subtracted in the other.

82 / 2 = 41

your final answer is 41 mph.

7 0

3 years ago

Read 2 more answers

Simplify square root of -13

tino4ka555 [31]

Answer:

$\sqrt{13i}$

Step-by-step explanation:

Theoretically, there is not square root of neither 13 nor a negative number so the special symbol is used to represent the square root of a number.

8 0

3 years ago