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SCORPION-xisa [38]
2 years ago
5

5. Factor: x² - 4x-21

Mathematics
2 answers:
tekilochka [14]2 years ago
8 0

Answer:

(x - 7) (x + 3)

Step-by-step explanation:

masha68 [24]2 years ago
5 0
The answer is x² - 25

first you have to subtract the x² - 4x-21. And you get this x² - 25


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Which expression is equivalent to 36/(4 + y)?
I am Lyosha [343]

Answer:

B) 36/(y+4)

Step-by-step explanation:

Use the process of elimination.

A cannot work because we are changing the operation. Instead of dividing thirty-six by the sum of four and a number, we are dividing thirty-six by four, then adding the unknown number. This is not the same as the original expression, so we know it is not this.

Next, check C. C doesn't seem right either. Remember that, unlike multiplication and addition, you cannot flip the order in which the operation is being done and still get the same answer. C says four plus a number divided by thirty-six, which is entirely different from our original expression. So the answer is not C.

And finally, check D. D doesn't work either. With D, we are dividing thirty-six by a number, then adding it to thirty-six divided by four. This is not the same as our original expression, so D isn't it.

That leaves us with B. Does it work? Yes, because changing the y and the four still will give the same thing. And yes, because 36 is being divided by the sum of that number and four. So it is our answer.

8 0
2 years ago
Giving brainliest!!!!!!!!!!!!! Please be correct
Marysya12 [62]

Answer:

i cant see the picture

Step-by-step explanation:

5 0
2 years ago
Read 2 more answers
Can you guys help me with this problem, please I need it right now.
7nadin3 [17]

In the graph, the constant of proportionality is 40

<h3>Calculating the constant of proportionality</h3>

From the question, we are to determine the constant of proportionality

The constant of proportionality = \frac{y}{x}

From the graph, a point on the line is (1, 40)

That is,

When x = 1 and y = 40

Thus,

The constant of proportionality = \frac{40}{1}

Constant of proportionality = 40

Hence, the constant of proportionality is 40

Learn more on Constant of proportionality here: brainly.com/question/11391605

#SPJ1

3 0
1 year ago
BRAINLIEST &amp; 25 POINTS PLEASE HELP URGENT DUE IN 10 MINUTES.
Cerrena [4.2K]

Answer:

C) 24 adults

Step-by-step explanation:

Let A be the number of adults and C be the number of children.

If a ticket costs $8 per adult, we can express this as 8A

If a ticket costs $5 per child, we can express this as 5C

Combining the two expressions, we can write 8A+5C=272 as our first equation since the total amount of money collected is $272.

Our second equation would be A+C=40 since there are 40 people.

Now, we can take the second equation and write it as C=40-A so we can substitute the value of C into the first equation as 40-A so we only have to deal with one variable, the amount of adults that went to the theater.

The first equation now becomes 8A+5(40-A)=272 and is much easier to solve:

8A+5(40-A)=272

8A+200-5A=272

3A+200=272

3A=72

A=24

Therefore, there are 24 adults

5 0
2 years ago
Need help me please don't know this
motikmotik

Answer:

c.9

the correct answer

semoga jawapan ini membantu

8 0
2 years ago
Read 2 more answers
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