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3 years ago

A race takes 3 hours to complete. If the

Mathematics

2 answers:

Orlov [11]3 years ago

8 0

Answer:

15 miles per hour

Step-by-step explanation:

Speed = distance travelled / time taken

= 45 / 3

=15

Anon25 [30]3 years ago

7 0

Answer:

Speed is equals to distance divided by time

45 ÷ 3

you get 15 miles per hour

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Kevin is 3 times as old as Daniel. 4 years ago, Kevin was 5 times as old as Daniel.

Sauron [17]

Kevin's age = 24
Daniel's age = 8

One variable linear equation is an equation that has a variable and the exponent number is one.
Can be stated in the form:

or
ax + b = c, where a, b, and c are constants, x is a variable
Whereas the two-variable linear equation is a linear equation that has 2 variables and the exponent is one
Can be stated in the form:

x, y = variable
In the statement of the task:
Kevin is 3 times as old as Daniel.
Let Kevin = K, Daniel = D
then the age comparison :
K = 3D ⇒ equation 1
4 years ago, Kevin was 5 times as old as Daniel
then the equation becomes
K-4 = 5 (D-4)
K-4 = 5D-20
K = 5D-16 ⇒ equation 2
Both of these equations are equations that have 2 variables, so the solution can be used in 3 ways:
1. graph system
the solution is the intersection point of the two equations / lines.
2. substitution
the solution is we change one variable into another variable form of an equation, then substitutes that variable in another equation
3. elimination
the solution is to eliminate one variable from the equation system.
to determine the variable x we eliminate the variable y first, or vice versa.
We use the second method: substitution

4 0

3 years ago

Read 2 more answers

Please help.....................................................................

yarga [219]

The mean is every number added, then divided by the amount of numbers. range is the number that occurred most often. What does that get you?

7 0

3 years ago

Write a sentence to model the following equation:<br> -20+20=0

klemol [59]

Answer:

Step-by-step explanation:

Negative 20 plus 20 equals 0

4 0

3 years ago

Read 2 more answers

(i) 809, 708, 607, _____, _ class 4<br>__class 4

schepotkina [342]

Answer:

809, 708, 607, 506, 405, 304, 203, 102, 1, -100

Step-by-step explanation:

809, 708, 607, _____, _______

First term = 809

Second term = 708

Third term = 607

Difference between first term and second term = 809 - 708

= 101

Difference between second term and third term = 708 - 607

= 101

Therefore, the common difference is 101

Fourth term = 607 - 101

= 506

Fifth term = 506 - 101

= 405

Sixth term = 405 - 101

= 304

Seventh term = 304 - 101

= 203

Eighth term = 203 - 101

= 102

Ninth term = 102 - 101

= 1

Tenth term = 1 - 101

= - 100

809, 708, 607, 506, 405, 304, 203, 102, 1, -100

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3 years ago

-4/13 divided by 20/-39

jeka57 [31]

Answer:

I don't know sowwy :c

Step-by-step explanation:

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3 years ago