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3 years ago

15

Help needed for MATH problem

1 answer:

vivado [14]3 years ago

5 0

Answer:

1/ 10 ; 1/15

Step-by-step explanation:

Given that:

Fraction with brown hair = 2 /5

1/4 of brown haired girls have long hairs

2/3 of long, brown haired girls have green eyes.

Fraction of girls with long, brown hair :

1/4 of 2/5

1/4 * 2/5 = (1*2) / (4*5) = 2/ 20 = 1/10

Fraction with long, brown hair and green eyes :

2/3 of Fraction with long, brown hair :

2/3 of 1/10

2/3 * 1/10 = (2*1) / (3*10) = 2/30 = 1/15

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How do you measure hexagonal prism

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Answer:

See below.

Step-by-step explanation:

There are only two measurements necessary to fully identify a regular hexagonal prism: (1) length of one of its sides (s), and (2) its height (h). From these two measurements, the surface area as well as volume can be determined using the following formulas:

$A=6sh+3\sqrt{3}s^2\\V=\frac{3\sqrt{3}}{2}s^2h$

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3 years ago

4. What is the value of the expression: -14 + 5 + -9

xeze [42]

Answer:⇒=-18

Step-by-step explanation:

P-Parenthesis

E-Exponents

M-Multiply

D-Divide

A- Add

S-Subtract

First, add and subtract from left to right.

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Hope this helps!

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-Charlie

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4 years ago

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at a library book sale, hardcover books sell for $4 and paperbacks sell for $2. The expresstion 4b+2b represents the total cost

Aleonysh [2.5K]

Answer:

6b is a simpler expression that is equivalent to 4b+2b.

Step-by-step explanation:

Given : At a library book sale, hardcover books sell for $4 and paperbacks sell for $2.

The expression 4b+2b represents the total cost for b hardcover books and b paperbacks.

We have to write a simpler expression that is equivalent to 4b+2b.

Equivalent expression are expression which are different in seeing but when we solve both we get the values same as the original expression.

Given expression is 4b+2b,

We can take 2b common from terms to get an equivalent expression as,

4b+2b = 2b(2+1) = 2b(3) = 6b.

Thus, 6b is a simpler expression that is equivalent to 4b+2b.

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3 years ago

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A triangular pyramid has an isosceles triangular base. The base edge of the triangular base is 10

tester [92]

Answer:

h=94.87

Step-by-step explanation:

1. Volume of pyramid formula:

$v=\frac{1}{3}*a^{2}*h$

$a=b*h$ Base Edge * Height of Pyramid

2. We have variables:

V = 480, Base Edge = 10, Height of Base = 16 (Inch)

3. Plug into formula + Rearrange:

$\frac{3V}{h} =(b*h)^{2} [b^{2} *h^{2} ]$

$\frac{3V*b^{2} }{h} =h^{2}$

$h^{2}=\frac{3*480*10^{2} }{16}$

$h=\sqrt{9000}$

h≅94.868

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3 years ago