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2 years ago

Solve for x: 2/5=4/x

Mathematics

2 answers:

pickupchik [31]2 years ago

8 0

The answer is 10

Explanation: First you cross-multiply to get 2x=20 and then divide by 2 to get x=10

Sergeeva-Olga [200]2 years ago

6 0

9514 1404 393

Answer:

x = 10

Step-by-step explanation:

Using your number sense, you recognize that a fraction equivalent to 2/5 that has 4 in the numerator is 4/10. This tells you x = 10.

The usual instructions for solving this algebraically are to "cross multiply", then divide by the coefficient of x.

2/5 = 4/x . . . . given

2x = 20 . . . . . multiply by 5x on both sides

x = 10 . . . . . . . divide by 2

You can do the above two steps both at once: multiply by 5/2x.

(2/5)(5/2x) = (4/x)(5/2x)

x = 20/2 = 10

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Fond the area of the shaded sector of circle C to the nearest tenth

Lesechka [4]

Solution

Step 1

Write an expression for the area of sector

$Area\text{ (A) = }\frac{\theta}{360}\times\pi\times r^2$

Where

θ = 52°

π = 3.14

r = 8cm

Step 2

Find the area of the sector after substitution of values into the formula above.

$\begin{gathered} A\text{ =}\frac{52}{360}\times3.14\times8^2 \\ A=29.028cm^2 \end{gathered}$

To the nearest tenth the area of the shaded sector of circle C = 29.0cm²

5 0

1 year ago

Hey please help this is due today

Aleksandr [31]

Answer:

100

Step-by-step explanation:

Write in an equation:

4=4%x, then divide 4% from both sides, and then you get 100.

7 0

2 years ago

Read 2 more answers

In a bag of marbles, 10 are blue, 30 are yellow, 20 are red, and 40 are green.AN marbles is taken from the bag without looking.

antoniya [11.8K]

Answer:

see below

Step-by-step explanation:

10 are blue, 30 are yellow, 20 are red, and 40 are green.

There are 100 marbles in the bag

The color that has the most marbles is green

P( green) = 40/100 = 40%

P( yellow) = 30/100 = 30%

P( red) = 20/100 = 20%

P( blue) = 10/100 = 10%

You will be more likely to pick a green marble

5 0

3 years ago

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pshichka [43]

Answer:

linear

Step-by-step explanation:

4 0

3 years ago

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DerKrebs [107]

Answer:

They are

Step-by-step explanation:

AA congruency theorem

AA is angle angle

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4 0

2 years ago