8
According to the Red Cross, about 42% of Americans have Type A blood. Suppose 80
people show up at a typical blood drive.
What's the expected proportion of people who are Type A (p-hat)?

Answers

Answer 1

Answer:

33

hope this helped :)


Related Questions

Enter the number of complex zeros for the polynomial function in the box.



f(x)=x4+5x2+6

Answers

Answer:

4

Step-by-step explanation:

Given function

f(x)=x⁴+5x²+6

Zeros of the function:

x⁴+5x²+6 = 0(x²)² + 2x² + 3x² + 6= 0(x² + 2)(x² + 3) = 0

1. x²+ 2 = 0

x²= -2x₁,₂ = ±√2i

2. x² + 3 = 0

x² = -3x₃,₄ = ±√3i

As we see there are 4 complex zeros

Answer:

4

Step-by-step explanation:

NEED HELP WITH MATH! Will Give brainliest!

Answers

Answer:

3

Step-by-step explanation:

-1, 1, 2

What is the interest is the principal is $10,000 the interest rate is 2% and the time is eight years

Answers

Answer:

the answer is 160

Step-by-step explanation:

take the interest percentage and divide by 100 ex:5.2%100=0.052

take the dollar amount and multiply interest decimal

ex:$450*0.052=23.40

take the sum of dollar amount and interest decimal and multiply by # of years of interest

ex:3 years *23.40=70.20

and that is how i got that answer

 

3x^2+ 5x − 2 = 0 solve
SHOW ALL WORK AND STEPS FOR BRAINLIEST

Answers

9514 1404 393

Answer:

  x = -2 and x = 1/3

Step-by-step explanation:

The simple way to solve this is to enter the equation into a graphing calculator and have it show you what the zeros are.

The solutions are x = -2 and x = 1/3.

__

One way to solve this is to factor it. The product of the leading coefficient and the constant is (3)(-2) = -6. You want to find factors of this number that have a sum equal to the coefficient of the linear term: 5.

  -6 = (-1)(6) = (-2)(3) = ...

The first pair of factors listed here has a sum of 5, so we can rewrite the equation as ...

  3x^2 -x +6x -2 = 0

Factoring pairs of terms, we have ...

  x(3x -1) +2(3x -1) = 0

  (x +2)(3x -1) = 0

The solutions are the values of x that make these factors zero:

  x + 2 = 0   ⇒   x = -2

  3x -1 = 0   ⇒   x = 1/3

The solutions are x = -2 and x = 1/3.

help with the answer plz. help

Answers

i think that the answer us d

Answer:

D because 6 minutes and 60 meters meets on the graph

As a restaurant manager, you are tracking the number of ketchup bottles used each week in the restaurant. For six
weeks, the number of bottles used each week were 10, 14, 11, 10, 18, and 17.
What is the mean number of ketchup bottles used in one week?
A. 8
B. 10 C. 35/3
D. 40/3
E. 14

Answers

Answer:

The mean is 40/3 ⇒ D

Step-by-step explanation:

The mean of a set of data = The sum of data ÷ the number of data

∵ A restaurant manager tracking the number of ketchup bottles in

  six weeks

The number of data = 6

∵ The numbers of ketchup bottles used each week are 10, 14, 11, 10, 18, 17

→ Find their sum

∴ Their sum = 10 + 14 + 11 + 10 + 18 + 17

Their sum = 80

∵ The mean = The sum of data ÷ the number of data

∴ The mean = 80 ÷ 6

→ Simplify it by dividing both by 2

The mean = 40/3

given t(m)=7-9m, find t(m)=-2

Answers

Answer:

m=1

Step-by-step explanation:

-2=7-9m so -9=-9m so m=1

Item 16 Joanne paid $ 28 , 000 for her new car. In addition, she paid $ 1 , 400 in taxes. What was the tax rate Joanne paid on her new car?

Answers

Answer: 20%

Step-by-step explanation:

-7g+3g²-31-4g-9g²
Combine like terms to simplify

Answers

Answer:

6g^2−11g−31

Step-by-step explanation:

If this helps may i plz have brainliest :)

Help!!

Question 1 Multiple Choice Worth 4 points)
(02.05)
Solve the quadratic equation x? - 8x + 18 = 0 using the quadratic formula. What is the solution when expressed in the form a + bi, where a and b are real numbers?

Answers

Answer:

do u go to il Texas and BTW u look nice

-8x+18=0
-8x=0-18
-8x/8=-18/8
X= -18/8=-9/4

Help please answer correctly

Answers

What’s the question

evalute: 7.48 + (-8.245)​

Answers

Answer:

7.48−8.245

=7.48+−8.245

=−0.765

Answer:

-0.765

Step-by-step explanation:

Simplify: 7.48 + (-8.245) = 7.48 - 8.2457.48 - 8.245 = -0.765

I hope this helps!

help me please is of maths
here is the photo

Answers

Answer:

you're right

Step-by-step explanation:

it's telling me to add more characters so thus is what you get

i don’t know how to figure this out please help me

Answers

I got the same question

Answer:

Reverse

Step-by-step explanation:

Do the whole thing backwards in sentence

Start with y

Multiply by 7

Add 14

Take the square root

You end the number y.

Solve 18x+ 6>12x +18​

Answers

18x+6>12x+18
6x+6>18
6x>12
x>2

Question 2 (10 points) What is the y-intercept of this graph? $100 0 $200 $50​

Answers

Answer:

100 A

Step-by-step explanation:

Find the absolute value

| -5.2 |

Answers

Answer:

5.2 is the answer because i know

Step-by-step explanation:

make me brainiest

Select the correct answer from the drop-down menu. Triangle ABC is similar to Triangle DEF. The perimeter of Triangle ABC is five times the perimeter of Triangle DEF. The area of. Triangle ABC is 100 square centimeters. The area of DEF is how many square centimeters. ​

Answers

Answer:

20

Step-by-step explanation:

Answer:

the first one

Step-by-step explanation:

6. What is the area of a square with a side length of 7 + 2i ?
A. 25 + 28i
B. 45 + 28i
C. 45 - 14
D. 49 + 281

Answers

Answer:

B

Step-by-step explanation:

45 +28i
That’s your answer hope this helps

PLEASE HELP QUICK!!!!What is the greatest common factor of 40, 10, and 20?

Answers

Answer:

40? it could go on for infinite mate

Step-by-step explanation:

Answer:

10

Step-by-step explanation:

10 goes into 40 and 20 as the greatest common factor.

Hope this helps and pls do mark me brainliest if you can:)

Identify the slope and y-intercept of the following equation.

Answers

At the y m c a, having fun at the y m c a

You want to purchase a new car in 3 years and you anticipate the cost of the car to be $25,000. You are given an investment plan with a fixed APR of 5.3% if you make regular monthly deposits.
How much should you deposit at the end of each month to reach your goal of $25,000 in 3 years?

a.$642.23

c.$648.62

b.$645.65

d.$649.13

Answers

Answer:

The answer is A: $642.23

Step-by-step explanation:

I just took the test lol

I need help again . ASAP I don’t this lesson at all

Answers

Answer:

c = 33°, b = 147°

Step-by-step explanation:

You can just find that c + 147° makes a straight line (which is 180°) so c = 180° - 147°. You can do the same thing for b.

28-29 plz and thank you I really don’t knoe

Answers

Answer:

28 false 29 yes

Step-by-step explanation:

cuz im different

By Tuesday, Connie fed her cat 12 ounces of cat food. Based upon her ratio, how much dog food would Connie have fed her dog? Explain how you found your answer using both the table and the graph.

Answers

i need to see the table & the graph in order to answer this.

Sal's Pizza uses 720 pounds of flour i 4 weeks. Sal's is open 6 days a week and uses the same amount of flour each day. How much flower does Sal's Pizza use in 1 day?

Answers

Answer:

sal's pizza uses 30 pounds of flour in 1day

Step-by-step explanation:

Answer:

LET THE PIZZA BURN LIKE I DID

Step-by-step explanation:

What is 6/15 written as a decimal?

A. 0.4
B. 0.6
C. 2.0
D. 2.5

Answers

Answer:

the answer is A "0.4"

Step-by-step explanation:

Answer:

0.4

Step-by-step explanation:

just divide 6 by 15 and then it will give u the answer.

Kyle sells 20 boxes of fruit for a fundraiser.Omar sells 2 times as many boxes of fruit as Kyle sells.what is the total number of boxes that Kyle and Omar sell?

Answers

Answer:

60 boxes

Step-by-step explanation:

Kyle + (Kyle x 2)

20 + (20 x 2)

20 + 40

60

the answer is 60 boxes

Put these fractions in order of size, smallest to largest 2/3, 3/5, 7/10

Answers

Answer:

2/3, 3/5, 7/10

Step-by-step explanation:

hope that helped

Find the values of x and y. Justify your answers by stating the postulates, theorems, or definitions used for each step.

Answers

Answer:

Step-by-step explanation:

10) From the diagram you can see that the diagram at the right hand side is am isosceles triangle. An isosceles triangle is triangle that has its two base angles equal. Hence

x = 75°

Reason: Base angle of an isosceles triangle are equal.

To get y:

First we need to find the third angle of the isosceles triangle. Let's take the angle as p

Since sum of angle in a triangle is 180°, then

p+ 75 +x = 180

p+75+75 = 180

p+150=180

p = 180-150

p = 30°

To get y:

Know that the y + p = 90° (right angled)

y + 30 = 90

y = 90-30

y = 60°

Hence x = 75° and y = 60°

b)Note that the triangle in the middle is an equilateral triangle. The sum of angle in a triangle is 180°

Hence all the angles are 60°

To get x;

Sum of angle on the straight line is expressed as;

40°+60°+x° = 180°

100°+x = 180°

x = 180°-100°

x = 80°

Also since the lines are parallel, the angle at the right corner of the triangle is also 40° (corresponding to that angle at the corner of the first triangle)

To calculate y;

Sum of angle in the triangle at the right is 180° hence;

x+y+40 = 180

80+y+40=180

120+y = 180

y = 180-120

y = 60°

Hence the value of x and y are 80° and 60° respectively.

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