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
SVEN [57.7K]
3 years ago
11

PLEASE HELP!!!! I NEED TO GRADUATE HIGH SCHOOL!

Mathematics
1 answer:
Yakvenalex [24]3 years ago
8 0

Answer:

B

Step-by-step explanation:

Class A mean: 4.8

Class B mean: 4

B) yes, .8 less

You might be interested in
Solve for n<br><br>m = -2n-3/kn ​
Gekata [30.6K]

Answer:

n=\frac{-km}{2k+3}

Step-by-step explanation:

n=-km/2k+3

Hope this helps!

7 0
2 years ago
Suppose a and b are both non zero real numbers. Find real numbers c and d such that 1/a+ib= c+id
Thepotemich [5.8K]

\begin{gathered} c=\frac{a}{a^2+b^2} \\ d=\frac{-b}{a^2+b^2} \end{gathered}

Explanation

\frac{1}{a+bi}=c+di

Step 1

multiplicate by the conjugate

\begin{gathered} \frac{1}{a+bi}\cdot\frac{a-bi}{a+bi}=\frac{a-bi}{(a+bi)(a-bi)}=\frac{a-bi}{a^2-(bi)^2} \\ \frac{1}{a+bi}\cdot\frac{a-bi}{a+bi}=\frac{a-bi}{(a+bi)(a-bi)}=\frac{a-bi}{a^2-(-b^2)}=\frac{a-bi}{a^2+b^2} \end{gathered}

notice that

\begin{gathered} \frac{1}{a+bi}=\frac{a-bi}{a^2+b^2}=\frac{a}{a^2+b^2}-\frac{b}{a^2+b^2}i \\ \frac{a}{a^2+b^2}-\frac{b}{a^2+b^2}i=c+di \\ so \\  \end{gathered}\begin{gathered} c=\frac{a}{a^2+b^2} \\ d=\frac{-b}{a^2+b^2} \end{gathered}

I hope this helsp you

6 0
1 year ago
The scott family wants to fill up their swimming pool to the very top with water.The length of the pool is 50 meters annd the wi
inn [45]

Answer:

12,500 meters cubed

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
deposited $175 each month the balance of the savings account in 5 years will be $12,100.how much of the final balance will come
Ugo [173]

Answer:

$1,600

Step-by-step explanation:

To find out how much of the final balance will come from the interest earned, you have to determine the total value of the deposits made and subtract this from the balance the account will have after 5 years.

amount deposited each month: $175

months: 12*5= 60

Total amount deposited: $175*60= $10,500

Interests: $12,100-$10,500= $1,600

According to this, the amount of the final balance that will come from the interest earned is $1,600.

4 0
2 years ago
PLEASE HELP ME PICTURES INCLUDED
Nataliya [291]

Two equations given. We have to find the solution sets for the equations.

y = -x²-2x+8 and y = 2x +11

There are 3 steps given. As both equations are equal to y, so we can equate the x parts.

-x²-2x+8 = 2x+11

0 = x²+4x+3

0 = (x+1)(x+3)

Now we have to use zero product property to solve this. If multiplication of two terms equal to 0, we can set each of them equal to 0.

x+1 = 0 , x+3 = 0

When, x+1 =0, by moving 1 to the other side we will get x = -1.

When x+3 =0, by moving 3 to the other side we will get x =-3

Now for the two values of x, we have to find y .

When x = -1, by plugging in the value to the second equation we will get,

y = 2x+11 = 2×(-1)+11 = -2 +11 = 9

So for x =-1, y =9.

The solution set is (-1, 9)

Now when x = -3, by plugging in the value to the second equation we will get,

y = 2x+11 = 2×(-3) +11 = -6+11 = 5

So for x = -3, y = 5

The solution set is (-3,5)

Therefore, the solutions for the system of equations are (-3, 5) and (-1, 9)

So the third option is correct.

8 0
3 years ago
Other questions:
  • 50 Points!
    5·1 answer
  • If the 1500-lblb boom ABAB, the 220-lblb cage BCDBCD, and the 169-lblb man have centers of gravity located at points G1G1, G2G2
    11·1 answer
  • Find the distance, to the nearest tenth, from R(7, –7) to U(–3, 2).
    15·1 answer
  • you and your friends go to the movies. The cost of admission is $9.50 per person. Create a table showing the relationship betwee
    6·1 answer
  • Describe a real world situation that would show a strong negative correlation explain your reasoning
    7·1 answer
  • How are you <br>What are you doing
    14·2 answers
  • If angle j has a measure of 37°, what is the measure of angle m
    9·1 answer
  • What is the slope of this​
    7·1 answer
  • 18x + 3y = -21 !!!!!!!!!!
    15·2 answers
  • Find the remainder for (x^10 + x^9 +...+x+1) divided by (x^2 - 1)
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!