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Anit [1.1K]
3 years ago
10

Given a = 4, b = -2 and c = 8, evaluate ab - bc. -24 -4 8

Mathematics
1 answer:
Mrac [35]3 years ago
8 0
(4*-2)-(-2*8)=
-8--16=8
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Y=-x^2-x-3 find the X intercept for The parabola define by this equation
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To find the X intercept make y =0. Then factor out a negative on the side with the equation for each of the terms, so it becomes
0=-(x^2+x+3)
0=(x^2+X+3)
0-3=(x^2+X)
-3=x(X+1)
-3=X, X intercept -3,0
-3=(X+1)
-4=X, X intercept -4,0.
These are possible X intercepts you can check by using quadratic formula as well.
7 0
3 years ago
I don’t know how to do this one.
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Answer:

(a) The unit circle is centered at (0,0) with a radius of 1.

(b) The equation of a circle of radius <em>r</em>, with a center located at (0,0):

<em>x</em>²<em>+ y</em>² <em>= r</em>².

(c) (i) P(1,0)

    (ii) P(0,1)

    (iii) P(-1,0)

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Step-by-step explanation:

5 0
3 years ago
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Identify the property or rule 85+0=
frez [133]
IdentityProperty of Addition OR Zero Property
8 0
3 years ago
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Use the diagram to answer the question
koban [17]

Answer:

m\angle EFG=52^{o}

Step-by-step explanation:

We have been given that line m is parallel to line p, m\angle HEF=39^{o} and m\angle IGF=13^{o}.

Since line m is parallel to line p and EJ is a transversal, so measure of angle EJG will be 39 degrees as angle EJG is alternate interior angle of angle HEF. Both angles are inside parallel lines m and p and on opposite side of transversal EJ.

We can see that angle EFG is exterior angle of triangle GFJ. Since the measure of an exterior angle of a triangle equals to the sum of the opposite interior angles.

We can see that angle IGF and angle EJG are opposite interior angles of angle EFG.

m\angle EFG=m\angle IGF+m\angle EJG

Upon substituting our given values we will get,

m\angle EFG=13^{o}+39^{o}

m\angle EFG=52^{o}

Therefore, measure of angle EFG is 52 degrees.

3 0
3 years ago
University officials say that at least 70% of the voting student population supports a fee increase. If the 95% confidence inter
baherus [9]

Answer:

The interval estimate is above 70%, so infer that it will be supported.

Step-by-step explanation:

The evidence that 95% confidence interval estimating the proportion of students supporting the fee increase is [0.75, 0.85] supports university officials' claim that at least 70% of the voting student population supports a fee increase.

Therefore we can infer that a fee increase will be supported.

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