y = 3x^2+20 when x = 21

Answer:

9.55 cm

Step-by-step explanation:

A quadrant of a circle is 1/4 of a circle.

Since the curved edge is 15 cm, a full circle would be 60 inches.

60/Pi = diameter

diameter = 60/3.14 = 19.11 cm

diameter/2 = radius

radius = 19.22/2 = 9.55 cm which is the length of a straight edge.

Answer:

Step-by-step explanation:

Answer:

408ft^2

Step-by-step explanation:

Answer:

can't see the question ⁉️

Answer:

there is two solutions to that problem. you can find x is equal to two numbers.

Answer:

2

Step-by-step explanation:

For A and B, count to the y axis (vertical line)

Answer:

One widely held theory about the purpose of dreams is that they help you store important memories and things you've learned, get rid of unimportant memories, and sort through complicated thoughts and feelings. Research shows that sleep helps store memories.

Answer:

hope it helps mark me as the brainliest

Step-by-step explanation:

One widely held theory about the purpose of dreams is that they help you store important memories and things you've learned, get rid of unimportant memories, and sort through complicated thoughts and feelings. Research shows that sleep helps store memories.

Answer:

59.85

Step-by-step explanation:

The scores on a mathematics exam have a mean of 70 and a stadard deviation of 7. Find the x-value that corresponds to the z-score -1.45.

We solve the above question using z score formula

z = (x-μ)/σ, where

x is the raw score

μ is the population mean = 70

σ is the population standard deviation = 7

z = -1.45

Hence:

-1.45 = x - 70/7

Cross Multiply

-1.45 × 7 = x - 70

-10.15 = x - 70

x = -10.15 + 70

x = 59.85

9514 1404 393

Answer:

  r = 120t/(120-t)

Step-by-step explanation:

Multiply by the denominator, isolate r terms, then divide by the coefficient of r.

  [tex]t=\dfrac{120r}{r+120}\qquad\text{given}\\\\t(r+120)=120r\qquad\text{multiply by $(r+120)$}\\\\120t=120r-tr\qquad\text{subtract $tr$}\\\\\dfrac{120t}{120-t}=r\qquad\text{divide by the coefficient of $r$}\\\\\boxed{r=\dfrac{120t}{120-t}}[/tex]

The formula for finding the area of any regular polygon if you know the length of one side and the apothem: A = (n × s × a)2 A = ( n × s × a ) 2 , where n is the number of sides, s is the length of one side, and a is the apothem.

Answer:

b i think

Step-by-step explanation:

Answer:

Number of boys who attended the community service event = 10

Step-by-step explanation:

Let [tex]x[/tex] denotes number of girls and [tex]y[/tex] denotes number of boys.

Twenty-six students attended the community service event.

So,

[tex]x+y=26[/tex]

The number of girls was 4 fewer than twice the number of boys.

[tex]x=2y-4[/tex]

Put [tex]x=2y-4[/tex] in [tex]x+y=26[/tex]

[tex]2y-4+y=26\\3y=26+4\\3y=30\\y=10[/tex]

So,

Number of boys who attended the community service event = 10

Answer:

I dont know lol...........

Answer:

36 minutes. I hope this helps! :)

Answer:

i think your answer would be 12

Step-by-step explanation:

there are 12 dots, so 12 robots were built

hope this helps! have a nice day!

Answer:

value of x is 22°

Step-by-step explanation:

It is 22 degrees because it is originally a right angle which is 90°. If you do 90-68 you would get 22. The reason you would subtract is because 68 is already used of the 90° angle. My explanation isn't that good.

Answer:

1/3= 137.51 so b

Step-by-step explanation:

Answer:

Step-by-step explanation:

[tex]\alpha =\frac{l}{r}[/tex]

alpha are the angle in radian.

l= lenght of de arc=12cm

r=radius=5cm

[tex]\alpha =\frac{12}{5} \\\\[/tex]

Converting the radian angle to degrees:

α--->θ

π--->180°

θ=(180°*α)/π

using the fact that: α=12/5

θ=(180°*12)/5

θ=432°/π

θ=137,5098°

θ=137,51°

Answer: d) 60

Step-by-step explanation:

so two numbers a+b=90 and also a-b=30

Lets assume a is the larger number. So we can plug and chug for time purposes I will explain why 60 is the answer. so 60-30=30 so b would be 30 and a would be 60. Also a+b or 60+30= 90 and that is the case the smaller number is 30 and the larger number is 60

Answer:

25

Step-by-step explanation:

it can carry 25 packs of shingles because

1 ton = 2000 ponds

and 80 can go into 2000 25 times

hope this helps!

Answer:

a.) Money left = $1

b) No

Step-by-step explanation:

Given - You have $15. It costs $ to ride each ride once,

To find - a. How much money do you have left if you ride each ride once?

              b. Do you have enough money to ride each ride twice? Explain.

Proof -

As it is not given in the question that, how much cost to ride each ride once.

Let us assume that,

The cost for each ride = $2

Total rides  = 7

Now,

Total money we have = $15

a.)

Given, cost for 1 ride = $2

⇒ Cost for 7 rides = 7×$2 = $14

∴ Money left =  $15 - $14 = $1

b.)

Given,

Cost for 1 ride = $2

Cost of 1 ride if we ride twice = 2×$2 = $4

Cost of 7 rides if we ride twice = 7×$4 = $28

As $28 > $15

So, we cannot ride each ride twice.

Answer:

the pic is blocked what the question

Step-by-step explanation:

Answer:

1: volume=4x4x6  96in^3

2:x=5

3: volume=3x7x8  168m^3

4:y=7

Step-by-step explanation:

1: 4x4x6  this is how you set it up

you multiply 4x4 first

4x4=16

then you multiply 16x6

16x6=96

volume is inches cubed

96 in ^3

2: 3*6*x=90  this is how you set it up

you have to isolate the variable

18x=90

divide each side by 18

x=5

3: 3x7x8 this is how you set it up

multiply 7x8 first

3x56

then multiple these two numbers

168

this time is is meters cubed

168m^3

4: 2*7*y=98 this is how you set it up

multiply 2*7 to start isolating the variable

14y=98

divide each side by 14

y=7

i really hope this helps!!!! :) have a good day!

Answer: 5.1

Step-by-step explanation:

use SOHCAHTOA

so its y/8  = cos(50)

y= cos(50) x 8

y = 5.1

Hope this helps!!

Answer:

3

Step-by-step explanation:

15*1/5= 3

Answer:

x= 73

y= 13

Step-by-step explanation:

The sum of the angles opposite the exterior angle = the exterior angle so

x= 141-68

x= 73

The angle sum of a triangle= 180.

180-68-73= 39

since there are 3 "y"s we need to divide 39 by 3

39/3= 13

Answer:

Step-by-step explanation:

First factor the polynomials and reduce the fractions.

Answer:

=25343 grams or 25 kg 343 g.

Step-by-step explanation:

1 kg = 1000 g

∴ 4 kg = 4000 grams

and the 4 kg 250 g would equal = 4250 grams.

∴ 2 kg = 1000 g

2 kg 90 g = 2000 grams + 90 g = 2090 grams

∴ 19 kg = 19000 grams

and 19 kg 3 grams = 19000 grams + 3 grams = 19003 grams

now we will add all of the values together to get the final answer.

4250 grams + 2090 grams + 19003 grams = 25343 grams or 25 kg 343 g.

Hope this helps!!