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Arturiano [62]
3 years ago
10

College Algebra: Systems of Equations & Inequalities

Mathematics
1 answer:
soldi70 [24.7K]3 years ago
3 0

play the video it will help you

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Can someone help me plz
wolverine [178]

Answer:

75°

Step-by-step explanation:

Recall: SOH CAH TOA

Reference angle = ? = θ

Side length opposite to reference angle = 27

Hypotenuse length = 28

Apply SOH, which is:

sin(\theta) = \frac{Opposite}{Hypotenuse}

Substitute

sin(\theta) = \frac{27}{28}

\theta = sin^{-1}(\frac{27}{28})

\theta = 75 degrees (nearest degree)

7 0
3 years ago
Solve each system of linear equations by elimination. <br><br>2v=-5 +10 <br>-15=-3x + 5y​
Burka [1]

Answer:Just solve it. This is Algebra. Not that hard. Use Substation Method

Step-by-step explanation:

3 0
2 years ago
Jess has 60 ounces of an alloy that is 40% gold. How many ounces of pure gold must be added to this alloy to create a new alloy
tia_tia [17]

Answer:

84 ounces of pure gold

Step-by-step explanation:

Jess has 60 ounces of an alloy that is 40% gold. How many ounces of pure gold must be added to this alloy to create a new alloy that is 75% gold?

Pure gold = 100% gold

Let the number of ounces of pure gold = x

Hence, we have the equation

40% × 60 ounces + 100%× x ounces = 75%(60 + x)ounces

= 0.4 × 60 + 1x = 0.75(60 + x)

= 24 + x = 45 + 0.75x

Collect like terms

x - 0.75x = 45 - 24

0.25x = 21

x = 21/0.25

x = 84 ounces

Therefore, we need 84 ounces of pure gold

6 0
3 years ago
The box plots show male and female grades in a physics class. Which of the following best describes the information about the in
AlekseyPX

Answer:

I think the other one is right

Step-by-step explanation:

8 0
2 years ago
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Hey video game randomly chooses your car color and type the probability of getting a red card is 0.20 and the probability of get
lapo4ka [179]

Answer:

A and B are independent events if P(A ∩ B) = 0.06

Step-by-step explanation:

Two events A and B are independent if the probability of occurrence of A does not influence the occurrence of B.

Mathematically it is written that A and B are independent events if and only if:

P(A ∩ B) = P(A)P(B)

We know that:

P(A) = 0.20

P(B) = 0.30

Then A and B are independent if:

P(A ∩ B) = (0.20)(0.30)

P(A ∩ B) = 0.06

Finally A and B are independent events if P(A ∩ B) = 0.06

8 0
3 years ago
Read 2 more answers
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