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Maksim231197 [3]

3 years ago

12

Twenty percent of all undergraduates at a university are chemistry majors. In a random sample of six students, find the probabi

lity that exactly four are chemistry majors.

1 answer:

tamaranim1 [39]3 years ago

6 0

The probability that 4 are chem majors would be 5%

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A store received a shipment of soup cans. The clerk put an equal number of cans on each of 4 shelves. Write an equation to repre

icang [17]

To represent the number of cans in each shelf you will divide the total number of cans by the number of shelves.

This is represented as
t/4 = n.

8 0

3 years ago

Read 2 more answers

Please solve them I really need help

Ugo [173]

Answer:

Answers are below

Step-by-step explanation:

12) No because the scale factor is not the same between the two rectangles

13) Yes. TUV is congruent to XYZ. The scale factor is 3/4.

14) Yes. I used SAS to see whether or not the triangles were similar. PQR is congruent to UVW.

15) Yes. I used 14) Yes. I used SAS to see whether or not the triangles were similar. DGH is congruent to FEH.

8 0

3 years ago

Use operations of decimal, fraction, and percent numbers to model the following scenarios. In your final answer, include only an

Helen [10]

$34*.15= 5.1 off
34-5.1= $28.99
It doesn't leave % to tip so no tip included. It also didn't leave % to tax.

5 0

2 years ago

Determine the next step for solving the quadratic equation by completing the square

GaryK [48]

Answer:

The two solutions are: $x=\frac{1}{2}+/-\frac{\sqrt{7} }{2}$

The next and every step are below.

Explanation:

1. $-3=-2x^2+2x$ : Given (addition property / add - 3 to both sides)

2. $-3 = - 2(x^2-x)$ : Given (commom factor - 2)

3. $-3-1/2=-2(x^2-x+1/4)$

To obtain the perfect square it was added the square of half of the coefficient of x: (1/2)² = 1/4, inside the parenthesis.

Since, the terms inside the parentthesis are multiplied by - 2, you have to add - 2 (1/4) = - 1/2 to the left side of the equation.

4. Now, you have that the trinomial x² - x + 1/4 is a square perfect trinomial which is factored as (x - 1/2)² and get the expression:

$-7/2=-2(x-1/2)^2$

5. Divide both sides by - 2 to get the next expression:

$-7/4=(x-1/2)^2$

6. The last step is to extract squere root from both sides of the equality:

$(x-1/2)=+/-\sqrt{\frac{7}{4}}\\ \\ x-1/2=+/-\frac{\sqrt{7} }{2}\\ \\ x=\frac{1}{2}+/-\frac{\sqrt{7} }{2}$

8 0

3 years ago

Please help with this question! I'm stuck on it and it's due on the 14th!

shtirl [24]

Josh did not follow the order of operations , he should have done 8x divided by 2 first but instead he did 4x- 8x

The correct solution...

4x-8x / 2

4x -4x
0
The solution should be zero (0)

Hope it helps!

4 0

3 years ago