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
nignag [31]
2 years ago
12

Math help can’t solve please

Mathematics
1 answer:
frez [133]2 years ago
7 0

Answer:

See below

Step-by-step explanation:

a) 43.8 - 38 = 5.8 yrs

b) SD = 8.9 yrs    5.8 / 8.9 = .6517 SD   <u> below</u> the mean

(A z score merely shows how many standard deviations a score (age) is above or below the mean in SD units)

c) Z =     - .6517     Negative because it is <u>BELOW</u> the mean                                                                                   ( FYI    from z-score table: this is .2578  in percentage )

d) usual       ( it  (-.6517)  is between -2   and + 2  )

You might be interested in
Liz got home from school at 4:33. She decided to bake muffins as an after-school snack. It took Liz 55 minutes to prepare and ba
IgorC [24]

Answer:

The muffins were done at 5:28

Step-by-step explanation:

you add 4:33 to 55 minutes knowing well that 60mins makes one hour

4:33

55

5:28

6 0
3 years ago
Solve the two-step equation. − 2 3 x – 21 4 = 27 4
svetoff [14.1K]

Answer:

Step-by-step explanation:

I'm going to assume that the problem is -23x -214 = 274

And in that case...

1. First isolate the x-value by adding 214 to both sides of the equation:

-23x = 488

2. Then, divide both sides by -23 to truly get x alone:

x = -\frac{488}{23} or -21.22

7 0
3 years ago
Read 2 more answers
The graph of y=f(x) is above. If f(−4)=k, what is the value of f(k)?
cupoosta [38]

Answer:

B

The answer is B, which is -1.5.

3 0
3 years ago
80 points! pls help! Recall that the equation for horizontal distance h in feet of a projectile with initial velocity v0 and ini
dem82 [27]

Answer:

a) 0.6435 radians

b) 80.1 feet/sec

Step-by-step explanation:

a) 75 = (50²/16)sin(theta)cos(theta)

sin(theta)cos(theta) = 0.48

2sin(theta)cos(theta) = 0.96

sin(2theta) = 0.96

2theta = 1.287002218

Theta = 0.6435011088 radians

b) 200 = (v²/16)sin(0.75)cos(0.75)

6416.072347 = v²

v = 80.10038918 feet/sec

6 0
3 years ago
How do you convert 2000 mg to grams? 2000mg = ____g
Mice21 [21]
1 mg = 0.001 grams. therefore 2000 mg = 2 grams
3 0
3 years ago
Other questions:
  • What is the slope of the line represented by the equation y =<br> x - 3?
    5·2 answers
  • Solve: The quantity 3 x minus 15 divided by 2 = 4x
    12·2 answers
  • Which one is the closest length of PQ
    15·1 answer
  • A system of equations that has no solution is called inconsistent
    13·1 answer
  • A sector with a radius of 6 cm has a central angle measure of 4pi/9 in radians. What is the area of the sector?
    8·1 answer
  • So 9x 4x#$ GOOD MATH BAD EGLISH
    15·1 answer
  • The regular cost of a sound system is $1499, but today it is on sale for $1100! That is a $399 saving. The sales clerk tells you
    5·1 answer
  • A scientist has 100 milligrams of a radioactive element. The amount of radioactive element remaining after t days can be determi
    11·1 answer
  • Pls help soon, my life depends on this test!!:))
    8·2 answers
  • Triangle with exactly <br> 2 equal sides
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!