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3 years ago

Can someone help me!!!!

Mathematics

2 answers:

Sladkaya [172]3 years ago

8 0

$\displaystyle\\m(\sphericalangle JKM)=\frac{1}{2}m(\sphericalangle JKL)\\\\ \text{Correct answer is A}$

raketka [301]3 years ago

6 0

Answer:

Question 54a: Option A

Question 54b: Bisect <JKM

Question 54c: First, bisect the 60 degree angle to create a 30 degree angle. Next you bisect the 30 degree angle to create 15 degree angle.

Step-by-step explanation:

Question 54a: ray KM, is a bisector of <JKL, thus m<JKM is 1/2 of <JKL

Question 54b: Bisecting a angle the is half of another angle would create an angle that is one fourth of the overall angle.

Question 54c: Bisecting angles cuts them in half.

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f(x) = -4x^2+12x-9f(x)=−4x 2 +12x−9f, left parenthesis, x, right parenthesis, equals, minus, 4, x, squared, plus, 12, x, minus,

Olin [163]

Answer:

The graph has only one x-intercept

Step-by-step explanation:

we have

$f(x)=-4x^2+12x-9$

we know that

The discriminant of a quadratic equation of the form

$ax^{2} +bx+c=0$

is equal to

$D=b^{2}-4ac$

in this problem we have

$f(x)=-4x^2+12x-9$

$a=-4\\b=12\\c=-9$

substitute

$D=12^{2}-4(-4)(-9)$

$D=144-144$

$D=0$

The discriminant is zero

That means ----> The quadratic equation has one real solution

The graph has only one x-intercept

3 0

3 years ago

A professor at a local university noted that the exam grades of her students were normally distributed with a mean of 73 and a s

Umnica [9.8K]

Answer:

88.51 is the minimum score needed to receive a grade of A.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 73

Standard Deviation, σ = 11

We are given that the distribution of exam grades is a bell shaped distribution that is a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

We have to find the value of x such that the probability is 0.0793.

$P( X \geq x) = P( z \geq \displaystyle\frac{x - 73}{11})=0.0793$

$= 1 -P( z \leq \displaystyle\frac{x - 73}{11})=0.0793$

$=P( z \leq \displaystyle\frac{x - 73}{11})=0.9207$

Calculation the value from standard normal z table, we have,

$P(z \leq 1.410) = 0.9207$

$\displaystyle\frac{x - 73}{11} = 1.410\\x =88.51$

Hence, 88.51 is the minimum score needed to receive a grade of A.

3 0

3 years ago

HELP PLZ ANYONE??? I AM VERY STUCK ASAP!!

Katena32 [7]

Answer:

The answer is A

Step-by-step explanation:

When you multiple the numerators across you get 39,283.2 not 39, 832. What this math problem is, is Dimensional Analysis. Its converting one unit of measurement to another

Another example:

Look at the attachment below.

3 0

3 years ago

Pls I need help fast and quick it's urgent!

sammy [17]

Answer:

I might be wrong but I think its the last answer choice.

Step-by-step explanation:

I'm sorry if its wrong :(

6 0

3 years ago

if i have a line y=4x+7. I want to create another line that is perpendicular through point A (16,2). What is the new equation?

Charra [1.4K]

Perpendicular lines have the negative reciprocal slope, so the slope of your new line will be -1/4 and the current equation will be as follows:
y = -1/4x + b
(where b is the y intercept)

to find b, plug in point A and you'll get:
2 = -1/4(16) + b
2 = -4 + b
6 = b

the equation will be:
y = -1/4x + 6

4 0

3 years ago