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Natali [406]
3 years ago
11

Which of the expressions below are equal to 5x + 20y? Select all that apply.

Mathematics
2 answers:
xeze [42]3 years ago
8 0
The correct answers are A and B.
Hope this helps!
olga_2 [115]3 years ago
3 0
A & B are the correct answers
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A street in San Francisco rises 20 feet for every 100 feet horizontally. What is the measure of the angle of elevation,
SIZIF [17.4K]

Answer:

11°

Step-by-step explanation:

tan ∅ = 20/100 = 0.2

∅ = 11.31°

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2 years ago
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7 0
3 years ago
30% of what number is 13.8?
Feliz [49]
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4 0
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Read 2 more answers
I roll a fair die twice and obtain two numbers X1= result of the first roll and X2= result of the second roll. Given that I know
azamat

By definition of conditional probability,

P(X_1=4\text{ or }X_2=4\mid X_1+X_2=7)=\dfrac{P((X_1=4\text{ or }X_2=4)\text{ and }X_1+X_2=7)}{P(X_1+X_2=7)}

=\dfrac{P((X_1=4\text{ and }X_1+X_2=7)\text{ or }(X_2=4\text{ and }X_1+X_2=7))}{P(X_1+X_2=7)}

Assuming a standard 6-sided fair die,

  • if X_1=4, then X_1+X_2=7 means X_2=3; otherwise,
  • if X_2=4, then X_1=3.

Both outcomes are mutually exclusive with probability \frac1{36} each, hence total probability \frac2{36}=\frac1{18}.

Of the 36 possible outcomes, there are 6 ways to sum the integers 1-6 to get 7:

(1, 6), (2, 5), (3, 4), (4, 3), (5, 2), (6, 1)

and so a sum of 7 occurs \frac6{36}=\frac16 of the time.

Then the probability we want is

P(X_1=4\text{ or }X_2=4\mid X_1+X_2=7)=\dfrac{\frac1{18}}{\frac16}=\frac13

6 0
3 years ago
PLEASE ANSWER ASAP
salantis [7]

Answer:

Step-by-step explanation:

e34

5 0
3 years ago
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