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3 years ago

What is 80% of 80? Math class spring break packet

Mathematics

2 answers:

Dima020 [189]3 years ago

7 0

The answer to this question is A. : )

Paul [167]3 years ago

7 0

Since 80% is more than half 80% of 80 is 64

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What is (1.2 × 102) × (3 × 10–5)?

fgiga [73]

The answer for this question is the letter B

3 0

3 years ago

Mac has 117 white and black

olga55 [171]

Answer:

The number of white horses is 52

Step-by-step explanation:

Let

x ----> the number of black horses

y ----> the number of white horses

we know that

$x+y=117$ ----> equation A

$\frac{x}{y}=\frac{5}{4}$

$x=\frac{5}{4}y$ ----> equation B

Substitute equation B in equation A and solve for y

$\frac{5}{4}y+y=117$

$\frac{9}{4}y=117$

$y=117(4)/9\\y=52$

therefore

The number of white horses is 52

3 0

3 years ago

A scientist has discovered an organism that produces five offspring exactly one hour after its own birth, and then goes on to li

Nookie1986 [14]

I got 20,737 but I could be wrong so I will attach my algorithm and work.

8 0

4 years ago

Given the area of circular base and the area of curved surface of the cone are 98.56 cm² and 264 cm² respectively. Find the heig

____ [38]

Answer: height = 13.9 cm

Step-by-step explanation:

The base area of a cone is the area of a circle. Given that base area = 98.56 cm^2

Base area = πr^2

Substitutes the value into the formula

98.56 = 22/7 × r^2

Cross multiply

689.92 = 22r^2

r^2 = 689.92/22

r = sqrt ( 31.36 )

r = 5.6 cm

Also, the curved surface area of a cone is πrL

Where the given value is 264 cm^2

Substitutes the value into the formula

264 = 22/7 × 5.6 × L

Where L = slant height

Cross multiply

123.2L = 1848

L = 1848 /123.2

L = 15 cm.

Using pythagorean theorem to find the height H of the cone.

H^2 = L^2 - r^2

H^2 = 15^2 - 5.6^2

H = sqrt( 193.64 )

H = 13.9 cm

5 0

3 years ago

Given angle EFG has angle bisector FH, where EF = GF, find the value of y if EH = 5y + 10 and HG = 28 - y.

Whitepunk [10]

Answer:

y = 3

Step-by-step explanation:

*As seen in the photo, the fact that EF = GF and the bisector being there makes EH = HG.

5y + 10 = 28 - y

*Add y to both sides.

6y + 10 = 28

*Subtract 10 from both sides.

6y = 18

*Divide both sides by 6.

y = 3

7 0

3 years ago