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3 years ago

What is the value of x ? A : 15 B : 30 C: 45 D : 60

Mathematics

2 answers:

jenyasd209 [6]3 years ago

7 0

Answer:

Step-by-step explanation:

So that is a 90 degree angle and there is an angle of 30. 30-90 is 60. 60 divided by 4 is 15. So thus the answer is A,15.

Sloan [31]3 years ago

6 0

Answer:

Step-by-step explanation:

90 is right angle

90 - 30 = 60

60 / 4 = 15 <---- theres the answer

hope i helped

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How many different arrangements of 3 letters can be formed if the first letter must be w or k (repeats of letters are allowed)

jekas [21]

Answer:

Total 1352 different arrangements can be formed.

Step-by-step explanation:

Total number of letters is 26 (a to z).

We need to find the arrangements of 3 letters

It is given that the first letter must be w or k and repetition of letters are allowed.

Since first letter can be w or k, therefore the possibilities for first letter is 2.

Repetition of letters are allowed and any letter can be formed in place of second and third letter.

So, the possibilities for second letter is 26 and possibilities for third letter is 26.

Total possibilities of arrangements of 3 letters is

$P=2\times 26\times 26=1352$

Therefore total 1352 different arrangements can be formed.

5 0

3 years ago

In a video game, a bird is flung on a sling shot and follows a parabolic path. The path of the bird can be modeled by the equati

Novay_Z [31]

Answer:

The bird will take 0.88 seconds to reach a height of 40 feet in the air for the first time

Step-by-step explanation:

we have

$h=-16t^2+55t+4$

This is a vertical parabola open downward

The vertex represent a maximum

where

h is the height of the bird

t is the amount of time, in seconds, the bird had been in the air

For h=40 ft

substitute in the quadratic equation

$40=-16t^2+55t+4$

$-16t^2+55t+4-40=0$

$-16t^2+55t-36=0$

The formula to solve a quadratic equation of the form

$ax^{2} +bx+c=0$

is equal to

$x=\frac{-b\pm\sqrt{b^{2}-4ac}} {2a}$

in this problem we have

$-16t^2+55t-36=0$

$a=-16\\b=55\\c=-36$

substitute in the formula

$x=\frac{-55\pm\sqrt{55^{2}-4(-16)(-36)}} {2(-16)}$

$x=\frac{-55\pm\sqrt{721}} {-32}$

$x=\frac{-55+\sqrt{721}} {-32}=0.88\ sec$

$x=\frac{-55-\sqrt{721}} {-32}=2.56\ sec$

therefore

The bird will take 0.88 seconds to reach a height of 40 feet in the air for the first time

3 0

3 years ago

Can someone please help me

stepan [7]

Step-by-step explanation:

it will be around $90.86

4 0

3 years ago

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What is the equation for this line?

Aneli [31]

The answer is the second one 1/2 -3

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4 years ago

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A dress that costs x dollars is on sale for 25% off. Which expressions represent the sale price, in dollars, of the dress? Selec

Nataly [62]

Answer:

The answer is 0.75x.

Step-by-step explanation:

If the dress is on sale for 25% off, then we know that the new sale price of the dress is x - (25/100)x = x - 0.25x = 0.75x.

7 0

3 years ago