All categories

3 years ago

Claire runs 10 km in 1 hour. How many kilometers does she run in a half an hour? in 2 1/2

2 answers:

8 0

So she runs 10km/1hr
so ?km/.5hr

do cross multiplication

(10) (0.5) = (1)(x)
5 = x
so in half an hour = 5 km

do the same thing for the 2.5 just put it instead of the 0.5 and solve
Good Luck!

Hope this helps ;)

katrin2010 [14]3 years ago

4 0

If she runs 10 km a hour. then she runs for 2 1/2 hours she runs 25 km. for half an hour she runs 5 km. hope this helps you

You might be interested in

How to use multiplication to find a fraction that is equivalent to 3/5

jok3333 [9.3K]

Answer:

the following are all equal

3/5 (x1)

6/10 (x2)

9/15 (x3)

12/20 (x4)

8 0

3 years ago

fred had a tray of brownies for his birthday. he ate 1/6 of the brownies by himself and his family ate 1/3 of the brownies how m

snow_lady [41]

We want to know how many brownmies did Fred and his family eat together.

We will call to the total of the brownies by 1. On this case, after Fred ate 1/3 of the brownies, he will have:

$1-\frac{1}{3}=\frac{3-1}{3}=\frac{2}{3}$

This means that he has left 2/3 of the brownies. After his family ate 1/6 of the brownies:

$\frac{2}{3}-\frac{1}{6}=\frac{4}{6}-\frac{1}{6}=\frac{3}{6}=\frac{1}{2}$

This means they will have left 1/2 of the tray of brownies, and that they ate half of it.

6 0

1 year ago

Valerie Watkins is preparing walnut and raisin mix. Walnuts cost $2 per pound and raisins cost $3 per pound. She wants to spend

iragen [17]

Answer:

7.5 pounds

Step-by-step explanation:

multiply by 3.

3x+3y=30

2x+3y=22.5.

x=7.5.

7.5+2.5=10.

7.5 pounds of walnuts, 2.5 pounds of raisins.

Hope this helps :D

4 0

3 years ago

Please look at the picture

arlik [135]

Answer:

1.5

Step-by-step explanation:

Vertical angles are congruent so:

7x=8x-12

Subtract 7x from both sides:

0=8x-12

Add 12 to both sides:

8x=12

Divide both sides by 8:

x=1.5 or

x= 3/2

7 0

3 years ago

One way to build a staircase is to attach triangular blocks to an angled support, as shown above. If the support makes a 32 angl

Ivan

All the angels ect would have to be equal to all of them dose it tell u the angels

3 0

3 years ago