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3 years ago

1/4x - 8=4. I am not understanding this question can someone help me plssss.

Mathematics

2 answers:

nirvana33 [79]3 years ago

6 0

Answer:

Step-by-step explanation:

Marysya12 [62]3 years ago

5 0

Answer: 48

Step-by-step explanation:

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HELP ME QUICK PLEASEEEE solve for x: 2/x-2+7/x^2-4=5/x

Anna35 [415]

$\displaystyle\\\\\frac{2}{x-2}+\frac{7}{x^2-4}=\frac{5}{x}\\\\\frac{^{x+2)}2~~~~~}{x-2}+\frac{7}{(x-2)(x+2)}=\frac{5}{x}\\\\\frac{2(x+2)}{(x-2)(x+2)}+\frac{7}{(x-2)(x+2)}=\frac{5}{x}\\\\\frac{2x+4+7}{x^2-4}=\frac{5}{x}\\\\\frac{2x+11}{x^2-4}=\frac{5}{x}\\\\5(x^2-4)=x(2x+11)\\\\5x^2-20=2x^2+11x\\\\5x^2-2x^2 -11x-20=0$

$\displaystyle\\3x^2-11x-20=0\\\\x_{1,2}=\frac{-b\pm\sqrt{b^2-4ac}}{2a}=\frac{11\pm\sqrt{121+4\cdot3\cdot20}}{2\cdot3}=\\\\=\frac{11\pm\sqrt{121+240}}{6}=\frac{11\pm\sqrt{361 }}{6}=\frac{11\pm19}{6}\\\\x_1=\frac{11-19}{6}=\frac{-8}{6}\\\\\boxed{\bf x_1=-\frac{4}{3}}\\\\x_2=\frac{11+19}{6}=\frac{30}{6}\\\\\boxed{\bf x_2=5}$

3 0

3 years ago

In a certain neighborhood there are 25 dogs and 10 cats. In a neighborhood across the way, the ratio of cats to dogs is the same

Akimi4 [234]

28 because 2.5 times 8 equals 20 plus that 8 equals 28.

Step-by-step explanation:

6 0

3 years ago

For all functions of the form f(x) = ax2 + bx + c, which is true when b = 0?

Klio2033 [76]

When b=0
f(x)=ax^2+c

test each
A. with x^2-1, A is false
B. with -x^2-1, B is false
C. cannot find contradiction
D. the axis is actually x=0, 0 is nithere positive nor negative, false

answer is C

7 0

3 years ago

Read 2 more answers

The 7th grade class participated in the following

marysya [2.9K]

Answer:

20 students

Step-by-step explanation:

Weight lifting:

8% = 0.08

250(0.08) = 20

5 0

3 years ago

How do you solve 4377 divided by 8

alisha [4.7K]

Answer:

4,337 goes on top & 8 on the bottom

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8 & the answer is 542.12

3 0

3 years ago