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kogti [31]
3 years ago
8

The numbers 1, 2, 3, and 4 have weights 0.1, 0.2, 0.3, and 0.4 respectively. Compute the weighted average. (to the nearest tenth

)
es )
Mathematics
1 answer:
VashaNatasha [74]3 years ago
3 0

Answer:

3.0

Step-by-step explanation:

1(0.1) + 2(0.2) + 3(0.3) + 4(0.4) = 3.0

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The answer would be 18 because if you put 3a+6a+a=180 (the degrees of a triangle) and solve it a becomes 18
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Jake buys apples buy the pound and they are 24 pounds in one case. Jake wants to order 480 pounds of apples so how may cases doe
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3 years ago
Perimeter/area (triangles)
Rzqust [24]

Answer:

12 ft²

50 ft²

Step-by-step explanation:

∆ABD = ∆CBD

Perimeter of ∆ABD = 12 ft²

Perimeter of triangle ∆CBD

If ∆ABD = ∆CBD

Then, Perimeter of ∆CBD = 12 ft²

∆ABC = ∆CDA

Area of ∆ABC = 25 ft²

Then the area of rectangle ABCD = Area of ∆ABC + Area of ∆CDA

= 25 ft² + 25 ft²

= 50 ft²

6 0
3 years ago
Please help!!!! For each sum or product, determine whether the result is a rational number or an irrational number. Then choose
fgiga [73]

Answer:

A) irrational because the sum or rational and irrational is always irrational

B) rational the sum of two rationals is always rational

C)irrational the product of a rational and a irrational is always irrational

D) irrational because the product is sometimes rational but sometimes not

Step-by-step explanation:

5 0
2 years ago
Ask Your Teacher Equal amounts are invested at 2%, 7%, and 9% annual interest. If the three investments yield a total of $828 an
Nookie1986 [14]

Answer:

$4600

Step-by-step explanation:

Write an equation to represent the problem.

Interest is calculated by multiplying the interest rate with the investment. <u>Multiplying each of the rates</u> (2%, 7% and 9%) <u>in decimal form with the investment amount is equal to the annual interest</u>, (828).

Convert a percentage to decimal form by dividing by 100:

2% ÷ 100 => 0.02

7% ÷ 100 => 0.07

9% ÷ 100 => 0.09

let "P" represent the amount of money for the total investment

0.02P + 0.07P + 0.09P = 828

Use the equation to solve for "P". Simplify by collecting like terms (numbers that have the same variable) then isolate "P" by moving the other numbers to the right side. To move a number to the other side, do it's reverse operation to both sides of the equation. (The reverse of multiplying is dividing).

0.02P + 0.07P + 0.09P = 828        Collect like terms

0.18P = 828        Isolate "P"

0.18P/0.18 = 828/0.18        Divide both sides by 0.18

P = 828/0.18         "P" is isolated because 0.18 cancelled out. Simplify.

P = 4600        Total investment

Therefore the total investment is $4600.

5 0
3 years ago
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