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elena-14-01-66 [18.8K]
3 years ago
7

The cross section of a metal ingot is a trapezoid. The cross section has an area of 39 square centimeters. The top base of the c

ross section is 12 centimeters. The length of the bottom base is 2 centimeters greater than the top base. How tall is the metal ingot? Explain
Mathematics
1 answer:
Fiesta28 [93]3 years ago
6 0
A trapezoid is a polygon of four sides with two parallel sides.

The area of trapezoid is the half sum of the lengths of the paralled sides times the height which is the distance between the parallel sides.

Call b1 and b2 the lengths of the two parallel sides and H the heigth, the formula is [1/2](b1 + b2) H.

We know b1 = 12cm, b2 = 12cm + 2 cm, and the area = 39 cm^2, then we can find H:

39 = [1/2](12 + 14)*H

39 = (13/2)H => H = 2*39 / 13 = 6 cm

Answer: 6 cm
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Roman55 [17]

Answer:

88m of fencing

Step-by-step explanation:

the cicumference of the garden is what we are looking out for,

and with the raduis .ie.14m

C=2πr

C=2•22/7•14

C=88m

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3 years ago
To the nearest​ dollar, the average tuition at a public four−year college was $3088 in 1997 and $3292 in 2000. ​Find, to the nea
Delicious77 [7]

the fees in 1997 was $3088

fees in 2000 was $3292

average rate of increase= (3292-3088)/(2000-1997) = 204/3=68

so average rate of increase is $68 per year

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3 years ago
Solve the simultaneous equation<br> 4x-y=9 <br> 2x-3y= -23
MrMuchimi

Answer:

x = 5

y = 11

Step-by-step explanation:

y = 4x - 9

2x -3(4x - 9) = -23

2x - 12x + 27 = -23

-10x = -23 -27

-10x = -50

minus cancels out

x = 5

y = 4(5) -9

y = 20 - 9

y = 11

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2 years ago
you are purchasing a house 12 years from now the estimated purchase price is $171,600 you want to make a 20% down payment how mu
IRINA_888 [86]

Answer:The answer would be $238.33 a month

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2 years ago
A gardener uses 1/3 of a liter of water to water 2/7 of a garden.
Serjik [45]

the gardener would need (1 + 1/6) liters of water to water the whole garden.

<h3>How much water would the gardener need to water the whole garden?</h3>

Here we know that the gardener needs 1/3 of a liter of water to water 2/7 of a garden.

Then we have the relation:

1/3 L = 2/7 of a garden.

Now, we want to get a "1 garden" in the right side of the equation, then we can multiply both sides by (7/2), so we get:

(7/2)*(1/3) L = (7/2)*(2/7) of a garden

(7/6)L = 1 garden.

(1 + 1/6) L = 1 garden

This means that the gardener would need (1 + 1/6) liters of water to water the whole garden.

If you want to learn more about fractions:

brainly.com/question/11562149

#SPJ1

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1 year ago
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