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Rashid [163]
3 years ago
8

REALLY NEED ALGEBRA HELP please

Mathematics
1 answer:
lisabon 2012 [21]3 years ago
8 0
A. The discriminant is 81. The formula is b^2 - 4ac.

B. 2 answer and both will be rational due to the fact that the discriminant is a perfect square. 

C. Solutions are 1/2 and -4. You can find using the quadratic formula. 
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Answer:D

Step-by-step explanation:

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Una empresa alquila tanques de agua en forma de cilindro.Cada tanque tiene un radio de 4 m y una altura de 3 m.
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$678.58 if u can give me brainliest thx! :)
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In the figure above line m is parallel to line n.
enot [183]

<u>Given</u>:

Line m is parallel to line n.

The measure of ∠1 is (4x + 15)°

The measure of ∠2 is (9x + 35)°

We need to determine the measure of ∠1

<u>Value of x:</u>

From the figure, it is obvious that ∠1 and ∠2 are linear pairs.

Thus, we have;

\angle 1+\angle 2=180^{\circ}

Substituting the measures of ∠1 and ∠2, we get;

4x+15+9x+35=180

             13x+50=180

                     13x=130

                        x=10

Thus, the value of x is 10.

<u>Measure of ∠1:</u>

The measure of ∠1 can be determined by substituting x = 10 in the measure of ∠1

Thus, we have;

\angle 1 =4(10)+15

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7 0
3 years ago
If x-1/x=5 find x^3+1/x^3=?
ipn [44]

\dfrac{x-1}{x}=5\ \ \ \ /x\neq0\\\\\dfrac{x-1}{x}=\dfrac{5}{1}\ \ \ \ |\text{cross multiply}\\\\5x=x-1\ \ \ \ |-x\\\\5x=1\ \ \ \ |:5\\\\x=0.2\\\\\dfrac{x^3+1}{x^3}=\dfrac{x^3}{x^3}+\dfrac{1}{x^3}=1+\dfrac{1}{x^3}\to1+\dfrac{1}{0.2^3}=1+\dfrac{1}{0.008}\\\\=1+\dfrac{1}{\frac{8}{1,000}}=1+\dfrac{1,000}{8}=1+125=126\\\\\text{Answer:}\ \dfrac{x^3+1}{x^3}=126

5 0
3 years ago
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Mark is a professional race car driver. He has competed in 15 races and won 40% of them. How many races has Mark won?
Romashka [77]

Answer:

6 is the answer

Step-by-step explanation:

8 0
3 years ago
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