MATHEMATICS MIDDLE SCHOOL

Please help! What is the value of B in the following proportion? 11/12 = B/156
A. 24
B. 143
C. 134
D. 170

Answers

Answer 1

Answer:

Answer:

B. 143

Step-by-step explanation:

11 b

----- = -------

12 156

using cross products

11 * 156 = 12 b

divide by 12

11 * 156/12 = b

11 * 13 = b

143 = b

Answer 2

Answer: B.143

step by step:
$(11)/(12) = (b)/(156)$
use cross multiplication
$12 * b = 11 * 156$
$12b = 1716$
divide both sides by 12
$(12b = 1716)/(12)$
$b = 143$

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What is the surface area of this prism? A. 120 cm2 B. 122 cm2 C. 240 cm2 D. 184 cm2

Answers

Here is how to get the Surface Area of a triangular prism.
First you must find their areas first then multiply it by 2 (because it has 2 faces) except for the base, since it has a triangular base.
A = bxh/2   A = 15 m x 30 m A = 30 m x 18 m
   = (18 m x 12 m )/2 = 450 m^2 = 540 m^2
   = 216 m ^2/2
   = 108 m^2
Add all the faces:
SA = 2 (108 m^2) + 2 (540 m^2 ) +  450 m^2
= 216 m^2 +1080 m^2 + 450 m^2
= 1,746 m^2
The answer is not found in your choices. The attached picture is also showing m (meter) as the unit used not cm.....so I guess you got the wrong choices.

Find the surface area of the pyramid

Answers

area of base + (area of triangle surface) = surface area of a pyramid
3 * 3 + (3 * 6 ÷ 2 * 4) = 45
The surface area of the pyramid is 45² yd.

A hand-held digital music player was marked down by 1/4 of the original price. A. If the sales price is $128.00, what is the original price?
B. If the item was marked up by 1/2 before it was placed on the sales floor, what was the price that the store paid for the digital player?
C. What is the difference between the discount price and the price that the store paid for the digital player?

Answers

A. OriginalPrice of music player = $170.67

B. The price that store paid for the player = $256

C. Difference between the discount price and price that the store paid = $128

What is marked up and marked down price?

Markup refers to the value that a payer adds to the cost price of a product. The value added is called the mark-up. The mark-up added to the cost price usually equals retailprice.

Markdown represents the difference between the original or full price of an item and the current price that's reduced. It's typically expressed as a percentage. Markdown allows retailers to sell their products at a lower rate.

Given, A hand-held digital music player was marked down by 1/4 of the original price.

Let the original price be x.

Then discount = x/4

So, Sale price = x- x/4 = 3x/4.

A. sale price given = $128

⇒ 3x/4 = 128

⇒ x = 128 × 4/3

⇒ x = 512/3 = 170.67

The original price $170.67

B. The item was marked up by 1/2 before it was placed on the sales floor.

then cost = $170.67 + $170.67 × 1/2

cost = $ 170.67 + $85.335

cost = $256.005 = $256

C. Difference between the discount price and price the store paid for the digital player

= cost - sales price = $256 - $128

= $128

Hence,

A. $170.67 is the originalprice of the digital music player.

B. Store paid price of $256 before it was placed on sales floor.

C. There was difference of $128 between discount price and the price store paid for the digital player.

Learn more about markedup and markeddown price here:

brainly.com/question/11067377

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It was marked down 1/4 of the original price to $128. That means $128 is equal to 3/4 of the original price. So the original price would be 4/3 of $128. I get $170.67 (rounded to the nearest cent).

what is 14b+3a=91?

I need to find the values of a and b please

Answers

$14b+3a=91\ \ \ \Rightarrow\ \ \ \ 14b=-3a+91\ /:14\n \n.\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ b=- (3)/(14)a +6 (1)/(2) \n \n \n14b+3a=91\ \ \ \Rightarrow\ \ \ \ 3a=-14b+91\ /:3\n \n.\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ a=-4 (2)/(3)b +30 (1)/(3)$