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3 years ago

8

If Bianca is trying to find the area of this rectangle. She already measured one side 10cm. Witch other length(s) could she meas

ure to use in her area calculation? Explain your reasoning

1 answer:

slavikrds [6]3 years ago

8 0

I wish I could say it to you but I don't know how to plan it

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Miss violet is buying granola bars for her students. she already has 16 granola bars in her desk and needs a total of 100 bars.

JulijaS [17]

Well, 100 - 16 = 84, and 84 divided by 12 is 7. She needs to buy 7 more boxes of granola bars for her students.

7 0

3 years ago

Geomertry Tangents Chords Sectors Arcs and segments! whichever one helps

8_murik_8 [283]

Answer:

1

Step-by-step explanation:

(195 - 85)/2 = 54x+1 -->

110/2 = 54x + 1 -->

55 = 54x + 1 -->

54 = 54x -->

1 = x

3 0

3 years ago

The lateral edge PA of a triangular pyramid ABCP is perpendicular to the base and PA = 2sqrt5 in. The base edges AB = 10 in, AC

DIA [1.3K]

Answer:

PQ = √84 = 2√21 in ≈ 9.165 in

Step-by-step explanation:

The base edges AB = 10 in, AC = 17 in, and BC = 21 in

Q ∈ BC and AQ is the altitude of the base.

Let BQ = x in ⇒ CQ = (21 - x) in

ΔAQB a right triangle at Q

∴ AQ² = AB² - BQ² = 10² - x² ⇒(1)

ΔAQC a right triangle at Q

∴ AQ² = AC² - CQ² = 17² - (21-x)² ⇒(2)

Equating (1) and (2)

∴ 10² - x² = 17² - (21-x)²

∴ 10² - x² = 17² - (21² - 42x + x²)

∴ 10² - x² = 17² - 21² + 42x - x²

∴ 10² - 17² + 21² = 42x

∴ 42x = 252

∴ x = 252/42 = 6

Substitute at (1)

∴ AQ² = AB² - BQ² = 10² - x² = 100 - 36 = 64 = 8²

∴ AQ = 8 in

∵ The lateral edge PA of a triangular pyramid ABCP is perpendicular to the base

∴ PA⊥AQ

∴ ΔPAQ is a right triangle at A,

PA = 2sqrt5 in and AQ = 8 in

∴ PQ (hypotenuse) = √(PA² + AQ²)

∴ PQ = √[(2√5)² + 8²] = √(20+64) = √84 = 2√21 in ≈ 9.165 in

6 0

3 years ago

Mai has to decide between two cafeteria meal plans. Under plan A, each meal cost $2.50. Under plan B, one month of meals cost $3

BaLLatris [955]

Answer:

If he eats more then 12 lunches in a month he should take Plan B, if he eats less then 12 lunches a month he should take Plan A.

Step-by-step explanation:

2.5x12=30

If he is on Plan A and buys 13 lunches it would cost more money then to be on Plan B. If he buys less then it would cost him less money to be on Plan A since he would be paying under $30.

4 0

2 years ago

Question 11-(3 marks available)

klasskru [66]

Answer: 1080 $cm^{2}$

Determine the values of b1, b2, and b3, the sides of the triangular base. Also determine the value of h, the height of the triangular base and l, the length of the prism (the length between the bases).

The sides of the triangular base are:

b1 = 13 in.

b2 = 14 in.

b3 = 15 in.

The triangular base is a right triangle, and so the height is one of our sides. We will use

h = 12 in.

The length of the prism is

l = 20 in.

total surface area = bh + (b1+b2+b3)*l

bh = 12*20 = 240 $cm^{2}$

l * (b1+b2+b3) = 20*(13 + 14+ 15) = 840 $cm^{2}$

TSA = bh + l * (b1 + b2 + b3) = 240 + 840 = 1080 $cm^{2}$

to know more about prism,

brainly.com/question/16128664

5 0

1 year ago