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Genrish500 [490]
3 years ago
9

What method would you choose to solve the

Mathematics
1 answer:
olga nikolaevna [1]3 years ago
7 0

Answer:

This is a quadratic equation . We order to equate to zero

2x² – 7 = 9  

2x² - 7-9 = 0

2x² - 16 = 0

This equation is a binomial

2* (x² - 8) = 0

We choose the simplest method . The equation with practice it can be calculated in the memory

The product is equal to 0 if one of the factors is zero

2≠0  ∨     x² - 8 = 0

              x² = √8

              x = √8     ∨  x= - √8

Answer : x = √8 ∨ x = -√8

Step-by-step explanation:

yw ofc

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What is 0.85714286 rounded to the nearest hundredth
elena-14-01-66 [18.8K]

Answer:

0.86

Step-by-step explanation:

Rounding rules.

4 and below, round down.

5 and above, round up.

We are going to look at the thousandths place to round to the hundredths place.

0.857 -> 0.86

Best of Luck!

8 0
3 years ago
Read 2 more answers
5x + 4(4x + 11) = 170 pearson realize
Jobisdone [24]

x=6

if you multiply 4 by whats inside the parenthesis you get 5x+16x+44=170

next combine like terms and get 21x+44=170

next subtract 44 from itself and 170 to get 21×=126

finally divide 21 from both sides and you get x=6

hope this helps!

4 0
3 years ago
Read 2 more answers
How many solutions does the equation have?
borishaifa [10]
First we have to distribute the parentheses on the left side, 2*x is 2x and 2*-3 is -6, so now the equation is 4x+2x-6 = 8x+12
Then, we can add together the two x's on the left side,
so now we have 6x-6 = 8x+12       Subtract 12 from both sides and
you get 6x -18 = 8x    Then you can subtract 6x from both the sides and get
-18 = 2x  Now we can divide both sides by 2, and the final answer is -9 = x
Since they are not the same and the two sides aren't unequal, there is one solution(:
Hope this is helping you(:
4 0
3 years ago
The graph of an inverse trigonometric function passes through the point (1, pi/2). Which of the following could be the equation
rodikova [14]

Answer: C) y=sin^-1 x

Step-by-step explanation:

Since, the graph of an inverse trigonometric function will pass through the point (1,\frac{\pi}{2}),

If this point satisfies the function,

For the function y=cos^{-1} x

If x = 1

y=cos^{-1}1=0

Thus,  (1,\frac{\pi}{2}) is not satisfying function  y=cos^{-1} x,

⇒ The graph of   y=cos^{-1} x is not passing through the point  (1,\frac{\pi}{2})

For the function y=cot^{-1}x

If x = 1

y=cot^{-1}1=\frac{\pi}{4}

Thus,  (1,\frac{\pi}{2}) is not satisfying function y=cot^{-1}x,

⇒ The graph of   y=cot^{-1}x is not passing through the point  (1,\frac{\pi}{2})

For the function y=sin^{-1} x

If x = 1

y=sin^{-1}1=\frac{\pi}{2}

Thus,  (1,\frac{\pi}{2}) is satisfying function y=sin^{-1} x,

⇒ The graph of   y=sin^{-1} x is passing through the point  (1,\frac{\pi}{2}).

For the function y=tan^{-1}x

If x = 1

y=tan^{-1}1=\frac{\pi}{4}

Thus,  (1,\frac{\pi}{2}) is not satisfying function  y=cos^{-1} x,

⇒ The graph of   y=tan^{-1} x is not passing through the point (1,\frac{\pi}{2}).

Hence, Option C is correct.

3 0
3 years ago
Which expression is equivalent to -3y^2-6y^2+6y
AveGali [126]

your answer would be: − 9 y^ 2 + 6 y

3 0
2 years ago
Read 2 more answers
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