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AnnZ [28]
3 years ago
9

Can you help with number 18 please?

Mathematics
1 answer:
motikmotik3 years ago
6 0

16.1 - 0.25 = 15.85
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What are the excluded values of x for
ss7ja [257]

Answer:

x = - 2, x = 9

Step-by-step explanation:

Given

f(x) = \frac{x^2-9x}{x^2-7x-18}

The denominator of f(x) cannot be zero as this would make f(x) undefined.

Equating the denominator to zero and solving gives the values that x cannot be.

x² - 7x - 18 = 0

(x - 9)(x + 2) = 0

Equate each factor to zero and solve for x

x + 2 = 0 ⇒ x = - 2

x - 9 = 0 ⇒ x = 9

The excluded values are x = - 2, x = 9

3 0
2 years ago
what are the steps to answer this question? Jeff is baking a cake. The recipe says that he has to mix 32 grams of powder to the
Deffense [45]
Well what I would do first is to divide 128 by 32 which I do believe gets you 4. So now you know that 1 cup of powder can make 4 servings. So you now know that each serving only requires 1/4 cup of the powder.

So now we know Jeff went over so now we have Jeff added 2/3 and he only needs 1/4. I would now make them both equivalent by multiplying the numerator and denominator of 2/3 by 4 and the same for 1/4 but instead by 4 multiply it by 3 which you would get 2/3=8/12 and 1/4=3/12. Now subtract the two to get your answer.

8/12-3/12=5/12

Answer: He went over and he needs to remove 5/12 of the cup
5 0
3 years ago
|c- 24| = 7c<br><br> :D :D :D
Ivanshal [37]

c\geq0\\\\\\ |c- 24| = 7c\\\\c-24=7c \vee c-24=-7c\\\\6c=-24 \vee -8c=-24\\\\c=-4 \vee c=3\\\\-4\not \geq0\\\\\boxed{c=3}

3 0
3 years ago
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Please help me with these two following questions ( second question has answer choices ) Thanks!
Nitella [24]
B. i hope this helps

3 0
3 years ago
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What is the value x in 8+6y=9
Rashid [163]

Answer:

Do you mean y? if you did it should be 1/6 or 1.666666 repeating.

Step-by-step explanation:

I needed the 6y to = 1 so I did the inverse of it by and got 1 so y should = 1/6


3 0
3 years ago
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