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Morgarella [4.7K]
3 years ago
12

A long-distance runner started on a course at an average of 9 mph half an hour later a second runner begin the same course of an

average of speed of 11 mph how long after the second runner starts the second runner take over the first runner

Mathematics
1 answer:
Firdavs [7]3 years ago
3 0

Answer:

2.25 hours

Step-by-step explanation:

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Safie can write a minimum of five questions per hour and a maximum of eleven questions per hour. What is the difference betwwen
Monica [59]

Answer:

<em>The difference is 30 hours</em>

Step-by-step explanation:

<u>Proportions</u>

Safie can write a minimum of 5 questions per hour and a maximum of 11 questions per hour.

To write 275 she takes a maximum of 275/5=55 hours and a minimum of 275/11=25 hours.

The difference is 55 hours - 25 hours = 30 hours

3 0
3 years ago
Select all expressions that are equivalent to -4(x + 2) – 2x + 4.
Nookie1986 [14]

Answer:

A,D,E

Step-by-step explanation:

-4(x + 2) – 2x + 4

=-4x-8-2x+4    D

=4x-2x-8+4     E

=-6x-4             A

Hope it helps!

3 0
3 years ago
If rx – st = r, which expression represents r.
statuscvo [17]

Answer:

{ \tt{rx - st = r}}

» Collect like terms, r terms on the left hand side by subtracting r from both sides and adding st to both sides

{ \tt{(rx - st) { \green{ - r + st }} = r{ \green{ - r + st}}}} \\ { \tt{rx - r = st}}

» On the left hand side, factorise out r

{ \tt{ \green{r(x - 1)} = st}} \\  \\ { \boxed{ \tt{ \blue{ \: r =  \frac{st}{x - 1} }}}}

5 0
2 years ago
Rosie just moved to new york city and makes $2,700 per month at her new job. each month, she pays $2,000 for rent, $100 for the
oksian1 [2.3K]

Answer:

2700 - 2000 = 700 - 100 = 600 - 200 = 400 - 100 = 300

300 dollars

7 0
2 years ago
Read 2 more answers
Select the correct answer from each drop-down menu.Complete the following proof.Given: WXYZ is a parallelogram with diagonals XZ
ohaa [14]

GIVEN:

We are given a parallelogram WXYZ with diagonals WY and XZ.

Required;

Prove that XZ bisects WY.

Explanation;

From the diagram provided, we can draw the following conclusion;

\begin{gathered} \angle WXY\cong\angle YZW \\  \\ \angle WXZ\cong\angle YZX \\  \\ Alternate\text{ }interior\text{ }angles \end{gathered}

Also, we have;

\begin{gathered} \Delta WZV\cong\Delta YXV \\  \\ SAS\text{ }congruency\text{ }criteria \end{gathered}

8 0
1 year ago
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