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KATRIN_1 [288]
3 years ago
7

PLEASE need help with these

Mathematics
1 answer:
Kryger [21]3 years ago
8 0

Answer:

63.72 ft^2

128 cm^2

Step-by-step explanation:

5.  The area of a triangle is

A = 1/2 bh  where b is the base and h is the height

A = 1/2(21.6) * (5.9)

   = 63.72 ft^2

6. The scale factor is 20/15 = 4/3

When we find area is the scale factor is squares

(4/3) ^2 = 16/9

Taking the ratio of the areas

A big trap

------------------- = scale factor squared

A little trap

A big trap     16

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

  72               9

Using cross products

9A = 16*72

9A = 1152

Divide each side by 9

A = 1152/9

A =128

The area of the large trapezoid is 128 cm^2

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Candice bought 4 boxes of cereal. If each box costs $3.75 and c represents how much she spent in all, which equation represents
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Answer:

c=4×$3.75

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It would be the problem above because c is the total which equals the total of 4×$3.75.

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ollegr [7]

Answer:

x = 120 degrees

Step-by-step explanation:

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3 years ago
A man sells a type of nut for $7 per pound and a different one for $4.20 per pound, how much of each type should be used to make
qwelly [4]

Answer:

a type nut is 10 pounds

a different one is 14 pounds

Step-by-step explanation:

let a type of the nut be represented by t

Let a different one be represented by d

a type of nut cost $7 per pound

a different one cost $4.20 per pound

The cost of the mixture for 24 pounds = 5.37 * 24

= $128.88

t + d = 24 ........(1)

7t + 4.2d = 128.88 ..........(2)

From equation (1), t = 24 - d

Put t = 24 - d in equation 2

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A type nut is 10 pounds. A different one is 14 pounds

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