1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
makkiz [27]
3 years ago
15

If f(x)=x^2-45, and f(2a)= -20, what is the value of a

Mathematics
1 answer:
Klio2033 [76]3 years ago
5 0
Hope this helps!!! :)

You might be interested in
A hi school is conducting a survey to see how many students have part time jobs. Would this sample be biased or unbiased?
nalin [4]
It would be biased because one would assume that students can get to school by means other than those that put them 8n the parking lor. (Parking lot = car drivers who would be the only students sampled.). Others may ride to school by either parent or school bus who could drop them off somewhere else or possibly walk to school. The freshmen/sophomores would be excluded generally as they would be too young to drive altogether
8 0
3 years ago
If p = .8 and n = 50, then we can conclude that the sampling distribution of pˆ is approximately a normal distribution
FrozenT [24]

Answer:

Yes we can conclude.

Step-by-step explanation:

The sampling distribution of \hat{p} can be approximated as a Normal Distribution only if:

np and nq are both equal to or greater than 10. i.e.

  • np ≥ 10
  • nq ≥ 10

Both of these conditions must be met in order to approximate the sampling distribution of \hat{p} as Normal Distribution.

From the given data:

n = 50

p = 0.80

q = 1 - p = 1 - 0.80 = 0.20

np = 50(0.80) = 40

nq = 50(0.20) = 10

This  means the conditions that np and nq must be equal to or greater than 10 is being satisfied. So, we can conclude that the sampling distribution of pˆ is approximately a normal distribution

6 0
3 years ago
URGENT!! LAW OF SINES WORK
Lynna [10]

Answer:

  1.  7.1 cm

  2.  10.9 cm

Step-by-step explanation:

1. You know the legs of a right triangle must be shorter than the hypotenuse. The only answer choice shorter than 8 cm is 7.1 cm.

__

2. By the Law of Sines, ...

  AB/AC = sin(ACB)/sin(B)

  AB = AC·sin(72°)/sin(38°) = 1.545·AC

The approximate value of AC from problem 1 is sufficient to get you close to the answer.

  AB ≈ 7.1×1.545 ≈ 10.9 . . . cm

6 0
2 years ago
What is the slope of y=5x-6<br> also, can anyone talk?<br> I made the stitch one rate it plz 1-10
Setler [38]
Slope is 5 y intercept (0,-6
8 0
3 years ago
A rectangle is placed around a semicircle as shown below. The length of the rectangle is 18ft. Find the area of the shaded regio
Irina-Kira [14]
Add 18ft+3.14=3.32 also in your paper write area=L×W
3 0
3 years ago
Other questions:
  • The sum of five more than a certain number and 10 more than twice the number is equal to the product of 2 and the number increas
    10·1 answer
  • HELLLP!!!
    10·1 answer
  • Solve 12x+6≥9x+12 (apex)
    14·1 answer
  • Order these numbers from least to greatest -4/5, 7/8, 0, -7, 1/2, 2
    12·1 answer
  • if three pipes are all opened, they can fill an empty swimming pool in 3 hours. THe largest pipe alone takes one third the time
    9·1 answer
  • In the middle of a test <br> Please answer!
    13·1 answer
  • If the Diameter of a circle is 30.4, what is the area of the circle?
    12·1 answer
  • Nancy needs 4/5 of a foot of ribbon to make a bow and she has 4 feet ribbon how many bows can she make
    7·1 answer
  • For problems 4-7, perform the indicated operation and reduce the answer to lowest terms.
    15·1 answer
  • Which expression is equivalent to 1.5 raised to the fifth power divided by 0.7 raised to the fourth power, all raised to the thi
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!