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Virty [35]
3 years ago
8

Please help with areas

Mathematics
1 answer:
Softa [21]3 years ago
7 0

Answer:

Step-by-step explanation:

7) The formula for determining the area of a parallelogram is expressed as

Area = base × height.

Length of base = Area/height

Therefore,

Length of base = 7/2 = 3.5 feet

8) The formula for determining the area of a trapezoid is expressed as

Area = 1/2(a + b)h

Where

a and b are the length of the bases

h is the height. Therefore

21 = 1/2(2 + 4)h

21 = 3h

h = 21/3 = 7 inches

9) Area = base × height.

Height = Area/Length of base

Height = 28/14 = 2 inches

10) a and b are 10 inches each.

Area = 1/2(a + b)h

Therefore,

35 = 1/2(10 + 10)h

35 = 10h

h = 35/10

h = 3 inches

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Please help!!!!!!! im so confused lol
pav-90 [236]

Answer:

a : c = 7 : 10

Step-by-step explanation:

The two ratios (a : b and b : c) both have b in common, so to work out what a : c is, we can use b to 'bridge' the two ratios together.

However, in a : b, b is 4. But in b : c, b is 2. We need to make sure b is the same in both ratios before we can combine the ratios together. The easiest way to do this is to multiply b : c by 2 to get b : c = 4 : 10. Now b is 4 in both ratios.

So now, we can combine the two ratios together to get a : b : c = 7 : 4 : 10. Since we only want a : c though, we can just drop the b and get a : c = 7 : 10. No simplifying is necessary since the ratio is already in its simplest form.

Hope that helps! :)

5 0
2 years ago
The mr William two questions please!
melamori03 [73]

well, in short, the students and chaperones are at a 2 : 9 ratio, and we know there are 171 students, how many chaperones then, so long they maintain a 2:9 ratio?

\bf \cfrac{chaperones}{students}\qquad 2:9\qquad \cfrac{2}{9}\qquad \qquad \cfrac{x}{171}=\cfrac{2}{9}\implies 9x=2(171) \\\\\\ 9x=342\implies x=\cfrac{342}{9}\implies x=38

5 0
3 years ago
Find the length of the side labeled x. Round intermediate values to the nearest tenth. Use the rounded values to calculate the n
strojnjashka [21]

Answer:

42.1

Explanation step-by-step:

Working out the lenght of the blue-dashed line:

SOH

47 is the Hypotenuse.

the blue line is the adjacent.

adjacent= Cos(30) x47

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Working out x :

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x = 40.7/ Tan(44)

x = 42.1

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3 years ago
What is the slope of the line
Nady [450]

Answer:

the slope is -2

Step-by-step explanation:

(1,0) (0,2)

<u>\frac{y2 - y1}{x2 - x1}</u>

<u>[tex] \frac{2 - 0}{0 - 1} = - \frac{2}{ 1} = </u><u>-</u><u>2</u><u>/tex]</u>

7 0
2 years ago
What is the value of x log3x equals 4
ArbitrLikvidat [17]

~~~~\log_3 (x) = 4\\\\\implies x= 3^4 \\\\\implies x= 81

7 0
2 years ago
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