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3 years ago

In a bag of marbles, there are 8 blue marbles and 5 green marbles.

Mathematics

2 answers:

Kamila [148]3 years ago

8 0

Ratio of blue marbles to green marbles

= 8:5

= 8×5:5×5

= 40:25

So, if there are 25 green marbles then there are 40 blue marbles.

polet [3.4K]3 years ago

6 0

8 because only the green marbles got added

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A plane at an altitude of 7000 ft is flying in the direction of an island . If an angle of depression is 21 ° from the plane to

Nonamiya [84]

The horizontal distance until the plan flies over the island is 2687.05 feet approximately.

<u>Solution:</u>

Given that, A plane at an altitude of 7000 ft is flying in the direction of an island

An angle of depression is 21 degree from the plane to the island

We have to find what is the horizontal distance until the plan flies over the island

The diagram is attached below

Assume as shown in the diagram , now we can use the right angle triangle property

$\tan (21)=\frac{\text {distance between plane and point above island}}{\text {height of plane}}$

$\tan (21)=\frac{\text {distance between plane and point above island}}{7000}$

$\text { Distance between plane and point above island }=7000 \times \tan (21)$

$=7000 \times 0.38386=2687.0482$

Hence, the distance between plane and point above island is 2687.05 feet approximately.

3 0

3 years ago

What are two partial products you would add to find 21 x 509?

Mama L [17]

45 and 63.9 I believe

3 0

3 years ago

What is the square root of 5x^2 = 300

vesna_86 [32]

So, values of x are: $x=2\sqrt{15},\,\,x=-2\sqrt{15}$

Step-by-step explanation:

We need to find the square root of 5x^2 = 300

Writing in mathematical form:

$5x^2=300$

Divide both sides by 5

$\frac{5x^2}{5}=\frac{300}{5}$

$x^2=60$

Taking square root on both sides

$\sqrt{x^2}=\sqrt{60}$

$x=\pm (\sqrt{2\times 2\times 3\times 5})$

$x=\pm (\sqrt{2^2 \times 3\times 5})$

$x=\pm (2\sqrt{3\times 5})$

$x=\pm (2\sqrt{15})$

$x=2\sqrt{15},\,\,x=-2\sqrt{15}$

So, values of x are: $x=2\sqrt{15},\,\,x=-2\sqrt{15}$

Keywords: Square root

Learn more about square root at:

#learnwithBrainly

7 0

3 years ago

Kyla has the number of cherries that Denise has. If Kyla has 46 cherries, how many cherries do they have altogether?

pogonyaev

Answer:

Step-by-step explanation:

46 + 46 = 92

5 0

2 years ago

Read 2 more answers

the art teacher asks her students to cut out apples from construction paper five apples can be cut from each sheet of paper. if

svlad2 [7]

1045 divided by 5=209

8 0

3 years ago