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2 years ago

I need help really bad I don't know how to do this

Mathematics

2 answers:

mixas84 [53]2 years ago

8 0

Complementary angles are 2 angles who add up to 90 degrees. Every one of the angles adds up to 90 degrees, so the assignment is asking you to find the missing number that makes the angles add up to 90.

Example: The first angle on your pager shows 45 and and a question mark. Ask yourself, what number + 45 = 90? The answer is 45. So, take the number of each angle they give you, and subtract it from 90. ( 90 - 45 ) and you have solved what the missing number ( ? ) is. Hope I helped!

NeTakaya2 years ago

5 0

Subtract the degrees shown by 90 since it is a right angle, which mean sit is at 90 degrees. so like for the 1st one, subtract 45 from 90. any questions?

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A bag contains three red marbles, six blue marbles, and three yellow marbles. What is the probability of selecting one red marbl

Fed [463]

A bag contains three red marbles, six blue marbles, and three yellow marbles.

therefore total no. of marbles = 3 + 6 + 3 = 12

total no. of red marble = 3

therefore probablity of selecting one red marble is 3/12 = 1/4

again total no. of blue marbles is 6

therefore probability of selecting one blue marble is 6/12 = 1/2

now total probability of selecting one red ball replacing it then selecting one blue marble is. 1/4 * 1/2 = 1/8

4 0

3 years ago

The perimeter of the big wheel of a bicycle is 9 cm longer than the perimeter of the front wheel. On the road of 120 cm, the big

beks73 [17]

Answer:

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A boy is cycling such that the wheels of the cycle are making 140 revolutions per minute. If the diameter of the wheel is 60cm, calculate the speed per hour with which the boy is cycling.

Easy

Solution

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Radius of the wheel =r=

=30 cm

Circumference of the wheel =2πr=2×

×30=

1320

Distance covered in 1 revolution =

1320

Distance covered in 140 revolutions =

1320

×140=26400 cm=264 m=

1000

264

Distance covered in one minute = Distance covered in 140 revolutions =

1000

264

Distance covered in 1 hour =

1000

264

×60=15.84 km

Hence, the speed with which the boy is cycling is 15.84km/hr.

3 0

2 years ago

PLS HELP ME AND SHOW WORK.

mario62 [17]

Answer:

$(x-2)^{2} +(y+6)^{2} =49$

Step-by-step explanation:

equation of circle =

$(x-h) ^{2} + ( y-k)^{2} = r^{2}$

( h , k ) = center of origin

$r^{2}$ = radius

origin = ( 2 , -6 )

radius = 7

$(x-2)^2+(y+6)^2=49$

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3 years ago

What's 4x divided by 2x

Ksivusya [100]

I think that's 2x but I'm not really sure.

I hope this helps.

5 0

3 years ago

what's the equation of the line parallel to the equation 2x+6y=-4 and that passes through the point (3, -3) .

Studentka2010 [4]

Y+3=(-1/3)(x-3)

y+3=(-1/3)x+1

y=(-1/3)x-2

3 0

3 years ago