All categories

3 years ago

Select three ratios that are equivalent to 8 : 5

Mathematics

2 answers:

Gennadij [26K]3 years ago

7 0

Answer:

16:10

48:30

32:50

Step-by-step explanation:

zimovet [89]3 years ago

6 0

40:25
16:10
24:15
hope this helps!

You might be interested in

36x-6 distributive property

Ahat [919]

Answer:

36x-6=0

36x-6+6=0+6

36x=0+6

36x=6

x=6÷36

x=6

3 0

2 years ago

Plzzzz Help meeeeee!!!!!!

mariarad [96]

Answer:

The cost of the $0.5 per cookies and $1.25 per brownie.

Option (A) is correct.

Step-by-step explanation:

Let us assume that the cost of the cookies =x

Let us assume that the cost of the brownie = y

As given

Sara is selling cookies and brownies as a fundraiser for the school band.

She charges $2.25 for two cookies and one brownie.

Than the equation becomes

2x + y = 2.25

She charges $5.75 for four cookies and three brownies.

4x + 3y = 5.75

Than two equation are

2x + y = 2.25 and 4x + 3y = 5.75

Multiply 2x + y = 2.25 by 3 and subtracted from 4x + 3y = 5.75

4x - 6x + 3y - 3y = 5.75 - 6.75

-2x = - 1

2x = 1

$x = \frac{1}{2}$

x = $0.5

Put in the equation 2x + y = 2.25

2 × 0.5 + y = 2.25

1 + y = 2.25

y = 2.25 - 1

y = $1.25

Therefore the cost of the $0.5 per cookies and $1.25 per brownie.

Option (A) is correct.

5 0

3 years ago

Suppose theta(????) measures the minimum angle between a clock’s minute and hour hands in radians. What is theta′(????) at 4 o’c

makvit [3.9K]

Answer:

$\frac{\pi }{30}$ radians per minute.

Step-by-step explanation:

In order to solve the problem you can use the fact that the angle in radians of a circumference is 2π rad.

The clock can be seen as a circumference divided in 12 equal pieces (because of the hour divisions). Each portion is $\frac{1}{12}$

So, you have to calculate the angle between each consecutive hour (Let ∅ represent it). It can be calculated dividing the angle of the entire circumference by 12.

∅= $\frac{2\pi }{12} = \frac{\pi }{6} rad$

Now, you have to find how many pieces of the circumference are between 12 and 4 to calculate the angle (Because 4 o'clock is when the minute hand is in 12 and the hour hand is in 4)

There are 4 portions from 12 to 4, so the angle (Let α represent it) is:

α= $(4)\frac{\pi }{6} = \frac{2\pi }{3}$

But the answer is asked in radians per minute. So you have to divide the angle by the amount of minutes between the hands of the clock at 4 o'clock.

There are 60 divisions in a clock for representing minutes, therefore in every portion there are:

$\frac{60}{12} = 5$ minutes

So, from the 12 mark to the 4 mark there are 20 minutes

The angle per minute is:

α= $\frac{2\pi/3 }{20} = \frac{2\pi }{(20)(3)} = \frac{\pi }{30}$ rad/min

Notice that the minimum angle is the angle mesured clockwise.

4 0

4 years ago

Order each set of numbers from least to greatest.

madam [21]

Answer:

1. -18,-7,-4,3,16

2. -39,-24,-12,20,24

3. -64,-57,-32,0,9

4. -24,-14,-8,-3,-1

Step-by-step explanation:

Negative numbers are always least.

6 0

3 years ago

A boy spent one-half of his money for a book and one-third of his money for a pen. The remaining $2.25 he saved. How much money

Tema [17]

Let his original money is x

So, $\frac{x}{2}$ + $\frac{x}{3}$ + 2.25 = x
or, $\frac{3x+2x+(6*2.25)}{6} = x$
or, 5x + 13.5 = 6x
or, x = 13.5

So, he had $13.5 originaly.

Thanks!

8 0

3 years ago

Read 2 more answers