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3 years ago

14

Answer the problems please. You have to find out what the letter means.

1 answer:

zheka24 [161]3 years ago

5 0

Answer:

29. x=5

30. a=7

31. r=8

32. c=4

33. w=3

34. m=9

Step-by-step explanation:

Hope this helps.

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A train leaves Los Angeles at 2 p.m. heading north at 50 mph. If the next train leaves three hours later and also heads north at

Mamont248 [21]

Since the first train has been travelling for 3 hours, we have the following equations:
$d=50t+3*50=50t+150$
$d=60t$

We want to know when they will be equal, so set these equal to eachother:
$60t=50t+150$
$10t=150$
$t=15$

So 15 hours after the second train leaves, they will be at the same distance. This is at 8AM since the second train leaves at 5PM.

5 0

3 years ago

Read 2 more answers

PLEASE HELP ASAP 25 PTS + BRAINLIEST FOR RIGHT/BEST ANSWER

sergejj [24]

8y = 4x -16

-x = -2y -4

Multiply all terms in the second equation by -1:

-x = -2y -4 x -1 = x = 2y +4

Now replace x in the first equation with this.

8y = 4(2y+4)

Simplify:

8y = 8y +16

Because there is an 8y on both sides of the equation, it cannot be solved.

The answer is no solution.

6 0

3 years ago

12(3+1) is what add the numbers inside and get the answer then multiply 12 with the answer

Lubov Fominskaja [6]

12(3+1)
12(4)

The number 12 times the number 4 is 48

3 0

3 years ago

Read 2 more answers

Can someone help me please?

taurus [48]

Answer:

437.4 meters squared

Step-by-step explanation:

7.2*4.5=32.4=b

3*4.5=13.5=h

b*h=a

32.4*13.5=437.4m^2

3 0

3 years ago

Read 2 more answers

Rich measured the height of a desk to be 80.7 cm. The actual height of the desk is 80 cm. What is Rich's percent error in this c

Hitman42 [59]

Answer:

0.9%

Step-by-step explanation:

We have been given that Rich measured the height of a desk to be 80.7 cm. The actual height of the desk is 80 cm.

We will use percentage error formula to solve our given problem.

$\text{Percentage error}=\frac{\text{Experimental value-Actual value }}{\text{Actual actual}}\times 100$

$\text{Percentage error}=\frac{80.7-80}{80}\times 100$

$\text{Percentage error}=\frac{0.7}{80}\times 100$

$\text{Percentage error}=0.00875\times 100$

$\text{Percentage error}=0.875\approx 0.9$

Therefore, Rich's percent error in calculation is 0.9%.

5 0

4 years ago