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Andrei [34K]
3 years ago
12

  PLZZZZZZZ HELPP  Which ordered pair is the solution to the system of equations? {y=2x−15} {4x+3y=−5} (5, −5) (4, −7) (0, 6) (7

, −11)
Mathematics
1 answer:
Sophie [7]3 years ago
8 0

solution is (4, - 7 )

given the equations

y = 2x - 15 → (1)

4x + 3y = - 5 → (2)

substitute y = 2x - 15 into (2)

4x + 3(2x - 15) = - 5

4x + 6x - 45 = - 5

10x - 45 = - 5 ( add 45 to both sides )

10x = 40 ( divide both sides by 10 )

x = 4

substitute x = 4 into (1) for corresponding value of y

y = (2 × 4 ) - 15 = 8 - 15 = - 7

solution is (4, - 7 )


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the sailboat named sand bug has a tall mast. the back stay (the heavy steel cable that attaches the top of the mast to the back
yaroslaw [1]
You would use the Pythagorean Theorem a²+b²=c² and re-arrange to get a²=c²-b² then you would put the numbers in and get a²=130²-50² so a²=14400 and if you square root that you get 120. So the height of the mast is 120 feet.
6 0
3 years ago
A change in the water level of a swimming pool is recorded as $-12$ inches.
DaniilM [7]

Answer:

True statements are:

C. The water level decreased by \abs{-12} inches.

E. The water level experienced a change of 12 inches.

Step-by-step explanation:

A change in the water level of a swimming pool is recorded a -12 inches.

Now, from the above statements, we have to choose options statements that are true.

A. The water level increased by 12 inches. This is false.

B. The water level increased by \abs{-12} inches. This is also false.

C. The water level decreased by \abs{-12} inches. This is a true statement.

D. The water level has a height of -12 inches. This is again a false statement.

E. The water level experienced a change of 12 inches. This is a true statement. (Answer)

8 0
3 years ago
Help me, please!!!!! CORRECT ANSWER GETS BRAINLIEST!!!!!!
sladkih [1.3K]
Hello,

Here is your answer:

The proper answer to your question is..... 200,000=4x-20

When your doing questions like these make sure you pay attention to the question.

Your answer is 200,000=4x-20

If you need anymore help feel free to ask me!

Hope this helps!
5 0
3 years ago
The amount of soda a dispensing machine pours into a 12-ounce can of soda follows a normal distribution with a mean of 12.45 oun
notsponge [240]

Answer:

0.1587

Step-by-step explanation:

According to the situation, the solution and the data provided is as follows

mean = 12.45 ounces

Standard deviation = 0.30 ounces

maximum = 12.75 ounces

More than ounces of soda = 12.75

Based on the above information, the probability is

Z=\frac{X-\mu }{\sigma } \\\\Z=\frac{12.75-12.45 }{0.30 } \\\\\Z=\frac{0.30 }{0.30 } \\\\Z= 1 \\\\P(X> 12.75)=1-P(X< 12.75) \\\\\P(X> 12.75)=1-P(Z< 1) \\\\

As we know that

P(Z<1) = 0.8413

So,

P (X > 12.75) = 1 - 0.8413

= 0.1587

5 0
4 years ago
Find the Quadrant in which csc x&lt; 0 and tan x &gt; 0
Zinaida [17]

Answer:

The chosen topic is not meant for use with this type of problem. Try the examples below.

( − 9 , − 7 )

(-4,7)

(1,3)

6 0
3 years ago
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