26 black cards of out 52

probability that a black card is chosen first = 26/52 = 1/2

there are 13 heart
with replaced

The probability of then drawing a heart is 13/52 = 1/4 then
the probability that a black card is chosen first and a heart is chosen second
= (1/2)(1/4) = 1/8

answer
1/8

3 0

3 years ago

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Solve 2 3/4a=19 1/4

melamori03 [73]

2 3/4a=19 1/4
÷2 3/4 ÷2 3/4
a=1/7

8 0

3 years ago

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Given g(x)=Squareroot x-4 and h(x)=2x-8, what is g(h(10))

yan [13]

Answer:

$g(h(10)) = 2\sqrt 2$

Step-by-step explanation:

Given

$g(x) = \sqrt {x - 4$

$h(x) = 2x - 8$

Required

$g(h(10))$

First, calculate $g(h(x))$

We have:

$g(x) = \sqrt {x - 4$

This gives:

$g(h(x)) = \sqrt {h(x) - 4$

Substitute $h(x) = 2x - 8$

$g(h(x)) = \sqrt {2x - 8 - 4$

$g(h(x)) = \sqrt {2x - 12$

Substitute $x = 10$

$g(h(10)) = \sqrt {2*10 - 12$

$g(h(10)) = \sqrt {20 - 12$

$g(h(10)) = \sqrt {8\\$

Split

$g(h(10)) = \sqrt {4} * \sqrt 2$

This gives

$g(h(10)) = 2\sqrt 2$

8 0

3 years ago

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72 is equal to 80% of a number n. Write and solve and equation to find n. Write the percent as a decimal.

valentina_108 [34]

Well I'm not sure what the answer would be since I'm not that smart but I did get the answer of 90, I did this by dividing 72 by 80 which equals .9 and I multiplied that by 100 and got 90.

4 0

3 years ago

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