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IRINA_888 [86]
3 years ago
8

What is the general form of the quadratic formula?​

Mathematics
2 answers:
sashaice [31]3 years ago
5 0

Answer:

C

Step-by-step explanation:

Lady_Fox [76]3 years ago
4 0

The general form of quadratic formula is,

x = \frac{-b+-\sqrt{b^{2}*4ac } }{2a}            (text didn't allow + and - together)

Therefore, the answer is option C

Happy to help :)

If you need help in this topic feel free to ask

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Two lines intersect in more than one point.
statuscvo [17]
That would be false because parallel lines don't intersect. But i can if one is straight and the other is Curved
7 0
3 years ago
What is the equation of a line when the slope is -1/2 and the y-intercept is 0.
tangare [24]

Answer:

y = -1/2x + 0

y = mx+b

Step-by-step explanation:

8 0
3 years ago
Proof:
Lapatulllka [165]

Answer:

Option B is correct

\angle 2 = \angle 3

Step-by-step explanation:

Given that:

\angle 1 and \angle 2 are supplementary.

prove that: a || b

It is given that:

\angle 1 and \angle 2 are supplementary.

By definition of supplementary

⇒\angle 1+ \angle 2 =180^{\circ}            .....[1]

From the figure, you can see that:

\angle 1 and \angle 3 are also supplementary.

⇒\angle 1+ \angle 3 =180^{\circ}            .....[2]

By [1] and [2] we have;

⇒\angle 1+ \angle 2=\angle 1+ \angle 3

Simplify:

\angle 2 = \angle 3

Since ∠2 and ∠3 are corresponding angles.

Corresponding angles states when the two lines are parallel, then Corresponding Angles are equal and vice versa.

by definition we have;

a || b                      proved!

7 0
4 years ago
Read 2 more answers
Kim was solving a problem using the six steps. First, she read the problem. Then she wrote down the facts and figures. Next, she
tia_tia [17]

<em>The answer would be 1 1/5 </em>

<em> </em>

<em>48/40 = 1 8/40 </em>

<em> </em>

<em>1 8/40 Simplify to 1 1/5 </em>

<em> </em>

<em>Hope this helps! </em>

   

PLZ GIVE ME BRAINLIEST

8 0
3 years ago
Read 2 more answers
The standard IQ test has a mean of 97 and a standard deviation of 17. We want to be
densk [106]

Let's call our estimate x. It will be the average of n IQ scores. Our average won't usually exactly equal the mean 97.  But if we repeated averages over different sets of tests, the mean of our estimate the average would be the same as the mean of a single test,

μ = 97

Variances add, so the standard deviations add in quadrature, like the Pythagorean Theorem in n dimensions.  This means the standard deviation of the average x is

σ = 17/√n

We want to be 95% certain

97 - 5 ≤ x ≤ 97 + 5

By the 68-95-99.7 rule, 95% certain means within two standard deviations. That means we're 95% sure that

μ - 2σ ≤ x ≤ μ + 2σ

Comparing to what we want, that's means we have to solve

2σ = 5

2 (17/√n) = 5

√n = 2 (17/5)

n = (34/5)² = 46.24

We better round up.

Answer: We need a sample size of 47 to be 95% certain of being within 5 points of the mean

6 0
3 years ago
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