All categories

3 years ago

The ratio of red marbles to blue marbles is 3 to 7 she has a total of 80. how many red and blue marbles

Mathematics

1 answer:

atroni [7]3 years ago

5 0

This means that 3/10 are red and that 7/10 are red, so 7/10(80) = 56blue marbles and 3/10(80)= 24red marbles

You might be interested in

The area of the square is 100 square centimeters. What is the area of the circle?

Setler79 [48]

$length \: of \: 1 \: side = diameter$

$area \: = {l}^{2} \\ 100 = {l}^{2} \\ \sqrt{100} = l \\ l = 10$

$diameter = 2 \times radius \\ 10 = 2 \times radius \\ radius = 5$

$circle \: area = pi \times {r}^{2} \\ circle \: area = 3.142 \times {5}^{2} \\ circle \: area = 3.142 \times 25 \\ circle \: area = 78.55 {cm}^{2}$

6 0

2 years ago

Read 2 more answers

1+2^2 for brainliest + 40 points

IrinaK [193]

Answer:

Step-by-step explanation:

u do 2x2 cuz of the square root and add the 1

5 0

3 years ago

Towers A and B are located 10 miles apart. A ranger spots a fire at a 42-degree angle from tower A. Another fire ranger spots th

steposvetlana [31]

Answer:

7.0 mi

Step-by-step explanation:

see the attached figure to better understand the problem

step 1

Find the measure of angle C

Remember that the sum of the interior angles in any triangle must be equal to 180 degrees

$A+B+C=180^o$

substitute the given values

$42^o+64^o+C=180^o$

$C=180^o-106^o=74^o$

step 2

Find the measure of a

Applying the law of sines

$\frac{c}{sin(C)}=\frac{a}{sin(A)}$

substitute the given values

$\frac{10}{sin(74^o)}=\frac{a}{sin(42^o)}$

solve for a

$a=\frac{10}{sin(74^o)}sin(42^o)$

$a=7.0\ mi$

6 0

3 years ago

Read 2 more answers

A ROPE IS 468 INCHES LONG. IF WE CUT IT IN 26 PIECES OF EQUAL LENGTH. HOW LOG IS EACH PIECE?

galben [10]

To find the answer to this question, you must divide 468 by 26. 468/26 = 18

Hope this helps!

7 0

3 years ago

Read 2 more answers

Please answer this in two minutes

ryzh [129]

Answer:

Step-by-step explanation:

To find Angle X we use sine

sin∅ = opposite/ hypotenuse

From the question

WY is the opposite

WX is the hypotenuse

So we have

sin X = WY/ WX

sin X = 6/7

X = sin-¹ 6/7

X = 58.99

X = 59° to the nearest tenth

Hope this helps you

8 0

3 years ago

Read 2 more answers