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Mama L [17]
2 years ago
15

Help for brainliest answer

Mathematics
1 answer:
guajiro [1.7K]2 years ago
8 0

Step-by-step explanation:

SA=ph+2A, that is, perimeter × height+ twice area

p=21+20+29=70cm

h=22cm

70×22=1540cm

A=1/2 ×20×21=210×2=420

1540+420=1960cm2

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B) The perimeter of the shape is 25.71 cm
natita [175]

Answer:

r=4cm

Step-by-step explanation:

Having the radius to be involved, the shape is a circle.

<u>Circumference formula </u>

c=2\pi r

Finding radius, formula will be reversed.

r=\frac{25.72cm}{2\pi }

r=\frac{25.71cm}{2(3.142)}            r=\frac{25.71cm}{6.284}          r=4.09cm

4 0
3 years ago
PLZ HELP SCALE FACTOR TRIANGLE<br><br> A. 10.5 cm<br> B. 31.5 cm<br> C. 63 cm<br> D. 189 cm
Anarel [89]

If two similar triangles have sides in the ratio a : b, then their areas are in the ratio a² : b².

We have the ratio:

54:18=\dfrac{54}{18}=3:1

Area of the smaler triangle = x

Area of the larger triangle = 567 cm²

Therefore we have the equation:

567:x=3^2:1^2\\\\\dfrac{567}{x}=\dfrac{9}{1}\qquad|\text{cross multiply}\\\\9x=567\qquad|\text{divide both sides by 9}\\\\x=63

<h3>Answer: C. 63 cm²</h3>
3 0
2 years ago
What is 14r-13s+19r+13s-18
Zielflug [23.3K]
77 is ur answer hope this helps u
8 0
2 years ago
Lola is making greeting cards, which she will sell by the box at an arts fair. She paid $50 for a booth at the fair, and the mat
Schach [20]

At some point, she will sell enough cards so that her sales cover her expenditures. So, the correct answer is ($40)

<h3> How did we figure this out?</h3>

Lola is making greeting cards, which she will sell by the box at an arts fair. She paid $50 for a booth at the fair, and the materials for each box of cards cost $8. She will sell the cards for $10 per box of cards.

We are going to use 50, 8 and 10 to find are answer.

Therefore, we are going to divide the numbers:

\boxed{50/10}

  • Division problem
  • 50/10
  • 8 x ? = 40
<h3 /><h3>What is the missing number?</h3>

First, we need to figure out 50/10:

\boxed{50/10=5}

\boxed{8x5=40}

5=40\\(50/10=5=8x5=40)

Therefore, at some point, she will sell enough cards so that her sales cover her expenditures. So, the correct answer is ($40)

8 0
1 year ago
. If the dealer gives Valerie 87.5% of the trade-in price on her car, listed below, approximately how much will Valerie pay in t
Evgesh-ka [11]

Round all dollar values to the nearest cent, and consider the trade-in to be a reduction in the amount paid

b.

$38,821

4 0
2 years ago
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