I need help with this please

Answers

Answer 1

Answer: The area of the first one would be the area of the rectangle minus the area of the circle, so 18*8 - (pi*3*3). That's equal to around 115.7257 inches squared.

The area of the second one would be the area of the triangle plus the area of the semicircle, so [(4*5)/2]*[(pi*2*2)/2]. That would be 20pi, or around 62.8319 ft squared

I'm not sure about the third one. Is it a trapezoid?

Related Questions

You are going to the movie theater with your parents and your 8 year-old brother. Adult tickets cost $8, ages 10 -18 cost $7.25 and under age 10 cost $4.25. If you spent an additional $20 on soda and popcorn, what is the total cost of your trip to the movie theater
Find the length of the base of a square pyramid if the volume is 1,024 cubic inches and has a height of 12 inches.
A theater has 30 seats in the first row, 33 seats in the second row, 36 seats in the third row, and so on in the same increasing pattern. If the theater has 15 rows of seats, how many seats are in the theater?
I need some help with this please! An explanation would be lovely too!
Lisa purchased a prepaid phone card for $25. Long-distance calls cost $.21 a minute using this card. Alyssa used her card only wants to make a long distance call. If the remaining credit on her card is $20.59, how many minutes did her call last?

Rachna has nickels, dimes, and quarters in her piggy bank. She has $4.65 altogether. She has three more quarters than dimes and twice as many nickels as quarters. How many quarters does Rachna have?

A. 8
B. 11
C. 22
D. 41

Answers

we can translate the given statements into algebraic expressions. In this case,

0.05x + 0.10y + 0.25z = 4.65z = 3 + yx = 2 z
solving these linear equations simultaneously, x = 22y = 8z= 11hence the answer is B. 11

For this case we have the following variables:

x: number of nickels

y: number of dimes

z: number of quarters

We now write the system of equations that models the problem:

$0.05x + 0.1y + 0.25z = 4.65 z = y + 3 x = 2z$

Rewriting the equations as a function of z we have:

$0.05 (2z) + 0.1 (z-3) + 0.25z = 4.65$

From here, we clear the value of z:

$0.1z + 0.1z - 0.3 + 0.25z = 4.65 0.1z + 0.1z + 0.25z = 4.65 + 0.3 0.1z + 0.1z + 0.25z = 4.65 + 0.3 0.45z = 4.95$

$z = (4.95)/(0.45) z = 11$

Answer:

The number of quarters that Rachna has is:

B. 11

Solve this equation for x in terms of y: 3x+2y=4

Answers

3x+2y=4
3x=4-2y

Answer: $x = (4-2y)/(3)$

$3x+2y=4\n\n3x=4-2y\ /:3\n\nx= (4)/(3) - (2)/(3) y$

Maria has a collection of 64 seashells consisting of three types bivalves,gastropods,and cephalopods.1/4 of her collection are bivalves and 3/8 of her collection are gastropods. How many of her seashells are cephalopods

Answers

Answer: the number of cephalopods in her seashells collection is 26.

Step-by-step explanation:

Maria has a collection of 64 seashells consisting of three types bivalves,gastropods,and cephalopods. If 1/4 of her collection are bivalves, it means that the number of bivalves that she has is

1/4 × 64 = 14

If 3/8 of her collection are gastropods, it means that the number of gastropods in her collection is

3/8 × 64 = 24

Therefore, the number of cephalopods in her seashells collection is

64 - (14 + 24) = 26

the area of a pentagon increased by 27 is the same as four times the difference of area and 15. what is the area of the pentagon?

Answers

this can be written as:
a+27=4(15-a)
now to work it out
a+27=4(15-a)
a+27=60-4a
4a+27=60
4a=33
a=8.25

hope this helps :)

Yvette is trying to calculate the distance between point C(1, 2) and point D(7, 10). Which of the following expressions will she use?

Answers

For the answer to the question above, this can be solve using the distance formula: D = sqrt [ (x2 – x1)^2 + (y2 – y1)^2] So the expression she should use is: D = sqrt [ (7 – 1)^2 + (10 – 2)^2] Then the answer would be: D = sqrt [ (6)^2 + (8)^2] D = 10 I hope my answer helped you.

Solve for
a. 7a-2b = 5a+b

Answers

Answer: The required value of a is $(3)/(2)b.$

Step-by-step explanation: We are given to solve the following equation for variable a :

$7a-2b=5a+b~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(i)$

To solve the above equation for a, we need to take terms involving a on one side of equality that that involving b on the other side.

So, from equation (i), we get

$7a-2b=5a+b\n\n\Rightarrow 7a-5a=b+2b\n\n\Rightarrow 2a=3b\n\n\Rightarrow a=(3)/(2)b.$

Thus, the required value of a is $(3)/(2)b.$

7a-2b = 5a + b
2a=3b
a = 3b/2