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finlep [7]
3 years ago
8

Can someone answer this question please please help me I really need it if it’s correct I will mark you brainliest .

Mathematics
2 answers:
In-s [12.5K]3 years ago
6 0

Step 1) Divide up the figure

In this figure, we have one large triangle, one square, and one rectangle. The triangle has a base of 15 feet and a height of 23 feet. The square is 5 feet by 5 feet. The rectangle is 6 feet by 17 feet.

Step 2) Find the area of each shape in the figure

Triangle: A = 1/2 x 15 x 23 = 172.5 square feet

Square: A = 5 x 5 = 25 square feet

Rectangle: A = 6 x 17 = 102 square feet

Step 3) Add the areas of each shape together

A = 172.5 + 25 + 102 = 299.5 square feet

Hope this helps! :)

kap26 [50]3 years ago
5 0

Answer:

84 idk

Step-by-step explanation:

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Find a quadratic equation that passes through the following points.
guapka [62]
Y = x2 - 3x is the quadric equation
8 0
3 years ago
Suppose we want to choose 4 colors, without replacement, from 18 distinct colors.
amm1812

Answers:

  • (a) 73440
  • (b)  3060

=====================================================

Explanation for part (a)

Consider four slots labeled A,B,C,D.

We have

  • 18 choices for slot A
  • 17 choices for slot B
  • 16 choices for slot C
  • 15 choices for slot D

We started at 18 and counted down until we filled the four slots. The countdown is because we cannot repeat a color. Multiply out those values to get the answer: 18*17*16*15 = 73440

You can use the nPr permutation formula as an alternative method

_nP_r = \frac{n!}{(n-r)!}

in this case n = 18 and r = 4. The exclamation marks indicate factorial.

-----------------------------------

Explanation for part (b)

Let's say we had color labels A,B,C,... all the way up to R which is the 18th letter in the English alphabet. From those 18 letters, we can only pick four. Let's say we pick D,E,F,G.

Focusing solely on the set {D,E,F,G}, we only have one set and the order doesn't matter. So {D,E,F,G} is the same as {D,E,G,F}.

There are 4*3*2*1 = 24 ways to arrange those four items meaning that we'll need to divide the result of part (a) by 24 to get the result of part (b)

73440/24 = 3060

You could use the nCr combination formula to get the same result

_nC_r = \frac{n!}{r!(n-r)!}

where n = 18 and r = 4 are the same from last time.

The connection between nPr and nCr is this

_nC_r = \frac{_nP_r}{r!}

which can be rearranged into

_nP_r = r!*\left( _nC_r \right)

these formulas are handy to help us go back and forth between nCr or nPr.

8 0
2 years ago
Using point-slope form, write the equation of the line that passes through (2, –1) and has a slope of –5.
erik [133]

Answer: (y+1)=5(x+2)

Step-by-step explanation:

6 0
2 years ago
A right circular cylindrical metallic rod is 15 inches tall. The radius of the base is 2 inches. What is the surface area of the
Artyom0805 [142]

Answer: Surface area = 68π inches²

Step-by-step explanation:

The formula for determining the total surface area of the circular cylindrical metallic rod is expressed as

Total surface area = 2πr² + 2πrh

Where

r represents the radius of the cylindrical rod.

h represents the height of the cylindrical rod.

π is a constant whose value is 3.14

From the information given,

Radius = 2 inches

Height = 15 inches

Therefore,

Surface area = (2 × π × 2²) + 2 × π × 2 × 15) = 8π + 60π

Surface area = 68π inches²

4 0
2 years ago
Simplify this expression.<br> 4(9n-9)<br><br> a. -10n+20<br> b. -10n+19<br> c. 36n-36<br> d. -8n+56
lesya692 [45]
<span>4(9n-9)
= 4*9n -4*9 (distributive property)
= 36n -36

The correct answer is c. </span>36n -36~
8 0
3 years ago
Read 2 more answers
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