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Oksana_A [137]
3 years ago
12

What does x equal in 3x 81 = -9?

Mathematics
1 answer:
vfiekz [6]3 years ago
6 0
Well first of what sign is in between the 3x and 81 
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Find the values of p and q in the figure.​
vivado [14]

Answer:

25 and 20

Step-by-step explanation:

p²=24²+7² ⇒ p²= 625 ⇒ p=25

q²=p²-15² ⇒ q²=625 - 225 ⇒ q²=400 ⇒ q= 20

6 0
4 years ago
Can someone please help me with this?
lidiya [134]
The angle formed by two tangles results in half of the difference of the two arcs. 

That is to say 

70 = .5(Major arc - minor arc)

Think of the major arc as the larger and the minor the smaller.

So therefore the difference in the two arcs = 140 (multiplying both sides of the above equation by 2.

140 = major arc - minor arc.

Another necessary idea is that the arc of a whole circle = 360 degrees, that is to say the major arc + minor arc = 360, giving us a second equation to solve.
Assuming x is the minor arc.

140 = major arc - x 
360 = major arc + x

Use linear combination and add these equations to get

500 = 2*major arc

major arc = 250
minor arc or x = 110.

The answer is 110 degrees.

8 0
3 years ago
A quadratic equation of the form 0 = ax2 + bx + c has a discriminant value of –16. How many real number solutions does the equat
vredina [299]

\bf \qquad \qquad \qquad \textit{discriminant of a quadratic} \\\\\\ y=\stackrel{\stackrel{a}{\downarrow }}{a}x^2\stackrel{\stackrel{b}{\downarrow }}{+b}x\stackrel{\stackrel{c}{\downarrow }}{+c} ~~~~~~~~ \stackrel{discriminant}{b^2-4ac}= \begin{cases} 0&\textit{one solution}\\ positive&\textit{two solutions}\\ \stackrel{-16}{negative}&\textit{no solution}~~\checkmark \end{cases}

6 0
3 years ago
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How do we do order of operations
inysia [295]

Answer:

<em>P</em>arentheses/brackets

<em>E</em>xponents

<em>M</em>ultiply

<em>D</em>ivide

<em>A</em>dd

<em>S</em>ubtract

4 0
3 years ago
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Which point is an x-intercept of the quadratic function f(x) = (x – 4)(x + 2)?
lozanna [386]

The quadratic equation is in factored form, which is f(x) = (x - a)(x - b), where a and b are the x-values for the x-intercepts.

The x-values for the x-intercepts are 4 and -2. We know that the y-value at any x-intercept must be 0 (otherwise it isn't an x-intercept).

Thus, either the points (4,0) or (-2,0) must be your answer (the question is only asking for one x-intercept).

7 0
4 years ago
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