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choli [55]
3 years ago
15

Plz help will mark you as brainliest(plz answer 42 and 43​

Mathematics
1 answer:
Lisa [10]3 years ago
3 0

Answer:

  • 41. D,
  • 42. B,
  • 43. A

Step-by-step explanation:

Sides are 120 m, 170 m, 250 m

<h3>41.</h3>

<u>S is the semi-perimeter and is equal to:</u>

  • s = (a + b + c)/2 = (120 + 170 + 250)/2 = 270 m

Correct choice is D

<h3>42.</h3>

The area is easy to calculate using the Heron's formula, since we have all three side lengths known.

Correct choice is B

<h3>43.</h3>

<u>Perimeter is:</u>

  • P = a + b + c = 120 + 170 + 250 = 540 m

Correct choice is A

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What should be included ina financial plan to protect assets?
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Answer:

b

Step-by-step explanation:

its important to have a large savings so that if something happens & it's an emergency, you can touch THOSE funds and not your assets, which may lose you money.

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4 years ago
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A metallurgist has one alloy containing 21% titanium and another containing 50% titanium. How many pounds of each alloy must he
sweet-ann [11.9K]

x = amount of 21% alloy

y = amount of 50% alloy

The metallurgist wants a combination weighing a total of 44 lb, so

x + y = 44

Each pound of either alloy contributes either 0.21 or 0.5 pound of titanium. The final product needs to be comprised of 37% titanium; weighing at 44 lb, this means it should contain 0.37 * 44 = 16.28 lb. So

0.21x + 0.5y = 16.28

From the first equation,

x + y = 44  ==>  y = 44 - x

Substitute this into the second equation and solve for x:

0.21x + 0.5(44 - x) = 16.28

-0.29x = -5.72  ==>  x = 19.72

Substitute this into the first equation to solve for y:

19.72 + y = 44  ==>  y = 24.28

8 0
3 years ago
What is the area of the following circle?
svp [43]

Answer:

50.27 is the correct answer, at least should be

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4 years ago
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Billy has already knit 23 centimeters of scarf, and can knit 1 centimeter each night. How many nights will Carey have to spend k
Kruka [31]

Answer:

13 nights

Step-by-step explanation:

To figure this out you first need to find out how many more centimeters to get to 36

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3 years ago
Find two positive numbers whose difference is 7 and whose product is 2438.
GaryK [48]

Answer: 348  and 355

Step-by-step explanation:

Let  two positive numbers are  x and y

so,

when  the difference is 7 then equation will become

x-y=7                   Eq(1)

when product is 2439 then equation will become

x*y=2438             Eq (2)

By rearranging Equation (2)

x= 2438/y         Eq(3)  

Now put the value of x as in eq (3) in eq(1) to get y's value

(2438/y)-y=7

(2438-1)/y =7

2437 / y =7

2437/7 =y

y=348.14    approx  348

Put the value of y in Eq(1) for x

x-348=7

x=7+348

x=355

so the two positve numbers are  355 and 348

For Check

x-y=7

355-348=7

7=7

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3 years ago
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