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Semmy [17]
3 years ago
6

Can somebody help me with 7n(4*8)

Mathematics
2 answers:
Radda [10]3 years ago
6 0
7n(4 x 8) = 7n x 32 = 224n
.............................................
True [87]3 years ago
5 0
Parenthesis first, (4*8)= 32 * 7n = 224n
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What is the value of the discriminant for the quadratic equation zero equals 2x^2+x-3
Liono4ka [1.6K]

Discriminant for the quadratic equation  2x^2+x-3=0 is d=25

How to find the d Discriminant of the quadratic equation ?

We know that the standard quadratic equation

ax^2+bx+c=0

Discriminant of the equation is d=b^2-4ac

Equation given in the question is

2x^2+x-3=0

So we can find the values of a,b,c

a=2\\b=1\\c=-3

Substitute the values

d=1^2-4*2*(-3)\\d=1+24\\d=25

Learn more about the discriminant of the quadratic equation here:

brainly.com/question/28048709

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7 0
2 years ago
3) Tara sold candles to raise money for new playground equipment at her school.
Ronch [10]

Answer:

Tara's current expression finds how much the school will be keeping. 50 x 2/5 (also written as 50 x 0.4) totals out as 20. $20 is 2/5 of $50. The expression that Tara SHOULD have written to find how much goes to the candle company would be 50 x 3/5 (also written as 50 x 0.6), as this adds up to 30. $30 is 3/5 of $50.

Step-by-step explanation:

50/5 = 10 which means that 1/5 of 50 = 10.

2/5 of 50 ($20) is kept by the school. This is what Tara's expression finds. This means that $30 is sent to the candle company, and can be found with the expression 50 x 3/5.

The decimals are created by dividing the numerator of the fraction by the denominator (I find it easier to do math with decimals).

3 0
2 years ago
For a population with an unknown distribution, the form of the sampling distribution of the sample mean is _____. Group of answe
Nesterboy [21]

For a population where the distribution is unknown, the sampling distribution of the sample mean will be b which is approximately normal for all sample sizes.

Given options regarding sample sizes.

We have to choose the correct option which shows the sample mean characteristics when the distribution is unknown.

Based on the central limit theorem the sampling distribution of the sample mean for either skewed variable ir normally distributed variable can be approximated given the mean and standard deviation.

The central limit theorem is said to be  true when n greater than or equal to 30.

When n is greater than 30 ,z test is used, when n is less than 30 ,t test is used.

Hence for a population where the distribution is unknown ,the sampling distribution of the sample mean will be approximately normal for all sample sizes.

Learn more about sample at brainly.com/question/24466382

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Question is incomplete as it includes options in a right way:

1)exactly normal for large sample,

2) approximately normal for all sample sizes,

3) exactly normal for all sample sizes.

6 0
2 years ago
Fine the slope of the line through each pair of points . (-8,-20),(5,2)
kozerog [31]

The formula of a slope:

m=\dfrac{y_2-y_1}{x_2-x_1}

We have the points (-8, -20) and (5, 2). Substitute:

m=\dfrac{2-(-20)}{5-(-8)}=\dfrac{22}{13}

Answer: The slope is \dfrac{22}{13}

7 0
3 years ago
Read 2 more answers
Please will anyone help me out with this math problem? I will give them a crown.
Aneli [31]

Answer:

a. 450 b.  10078.9097

Step-by-step explanation:

a. go with the formula W=FD

F= force

W= work done

D= distance

b. go with the formula F=mgcos(x)

M= mass

G= gravity constant (9.8)

then get to the normal formula of W=FD after getting the Force

4 0
3 years ago
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