3 years ago

I need help on number 9

Mathematics

1 answer:

lisov135 [29]3 years ago

3 0

Complement angles, sum is equal 90

Give one angle = 70 to find other: 90 - 70 = 20

Answer

Complement of angle with the measure of 70 degrees is 20 degrees

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Suppose that you draw two cards from a deck. After drawing the first card, you do not put the first card back in the deck. What

AVprozaik [17]

Answer:

The correct answer is 0.05882.

Step-by-step explanation:

A deck of cards have 52 cards, 13 cards of each suit.

We are drawing two cards without replacement.

We need to find the probability of getting a diamond as the first card.

Favorable outcomes are 13 and total number of outcomes are 52.

Thus this probability is $\frac{13}{52} = \frac{1}{4}$ .

Now for the next draw we again want to pick a diamond card.

Favorable outcomes are 12 and total number of leftover cards are 51.

Thus this probability is $\frac{12}{51}$ .

Now the probability that both cards are diamonds is $\frac{1}{4}$ × $\frac{12}{51}$ = $\frac{3}{51} = \frac{1}{17}$ = 0.0588235 ≈ 0.05882

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If it took 3 people 10 hours to plant a large garden, how long would it take one person? plzz help

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How many solutions does this system of equations have? Use either the substitution method or the elimination method. −2x + 4y =

Katen [24]

-2x+4y=4 Equation 1
x-2y=6 Equation 2
Solving by substitution method.
Isolate x from equation 2.
x=2y+6
Substitute value of x in equation 1
-2(2y+6)+4y=4
-4y-12+4y=4
-12=4
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Which is false.

Answer: No solution

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3 years ago

The results of a two-factor research study are organized in a matrix with the two levels of factor A for the rows and the three

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Answer:

SSbetween treatments

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SSbetween treatments or Sum of square between treatments is used to measure and compare the mean differences between treatments from which the variance will be computed.

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3 years ago

Given that XY is a line segment with the angle a = 48° and c = 59°, work out the value of the angle marked b.

olga nikolaevna [1]

Answer:

a+b+c = 180

48+59+b=180

107+b=180

b=180-107

b=73

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2 years ago