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
Aleks04 [339]
3 years ago
11

1/9 of people in a class are left handed.

Mathematics
1 answer:
LenaWriter [7]3 years ago
3 0

Answer:

left handed: right handed

1                     : 8

Step-by-step explanation:

1 out of every 9 people are left handed

9-1 = 8

That means 8 of the 9 are right handed

left handed: right handed

1                     : 8

You might be interested in
Juanita is having a party at her house she is inviting 12 people.there will be 3 times as many boys as girls invited. let x repr
Margaret [11]
X + 3x = 12 

(Or 4x=12)

the first x is the number of girls then the second x is the girls times 3, which is how many boys there are.
8 0
3 years ago
The mean score of a placement exam for entrance into a math class is​ 80, with a standard deviation of 10. Use the empirical rul
Sedbober [7]

Answer:

47.5%

Step-by-step explanation:

5 0
3 years ago
Rewrite with only sin x and cos x.
Annette [7]

Option A

\cos 3 x=\cos x-4 \cos x \sin ^{2} x

<em><u>Solution:</u></em>

Given that we have to rewrite with only sin x and cos x

Given is cos 3x

cos 3x = cos(x + 2x)

We know that,

\cos (a+b)=\cos a \cos b-\sin a \sin b

Therefore,

\cos (x+2 x)=\cos x \cos 2 x-\sin x \sin 2 x  ---- eqn 1

We know that,

\sin 2 x=2 \sin x \cos x

\cos 2 x=\cos ^{2} x-\sin ^{2} x

Substituting these values in eqn 1

\cos (x+2 x)=\cos x\left(\cos ^{2} x-\sin ^{2} x\right)-\sin x(2 \sin x \cos x)  -------- eqn 2

We know that,

\cos ^{2} x-\sin ^{2} x=1-2 \sin ^{2} x

Applying this in above eqn 2, we get

\cos (x+2 x)=\cos x\left(1-2 \sin ^{2} x\right)-\sin x(2 \sin x \cos x)

\begin{aligned}&\cos (x+2 x)=\cos x-2 \sin ^{2} x \cos x-2 \sin ^{2} x \cos x\\\\&\cos (x+2 x)=\cos x-4 \sin ^{2} x \cos x\end{aligned}

\cos (x+2 x)=\cos x-4 \cos x \sin ^{2} x

Therefore,

\cos 3 x=\cos x-4 \cos x \sin ^{2} x

Option A is correct

7 0
3 years ago
A drone has an effective range represented by a circle on a coordinate plane. The points (–12, 3) and (–6, –5) are endpoints of
Mrac [35]

Answer:

(x+9)^2 + (y+1)^2 = 100

Step-by-step explanation:

Since the question says diameter, we know the boundary in a circle. Therefore, we just need to find the center and radius.

The center is the midpoint of the two endpoints on a diameter.

Here, it is (-9, -1).

Therefore, the left part of the equation is (x- -9)^2 + (y - -1)^2 = (x+9)^2 + (y+1)^2.

The radius: sqrt(8^2 + 6^2) = 10

So the equation is (x+9)^2 + (y+1)^2 = 100

3 0
3 years ago
Read 2 more answers
Josiah used the distributive property to simplify the multiplication problem 9 × 4.7. Which of the following statements is true
zaharov [31]

Answer:

E. he multiplied 9 and 0.7 incorrectly.

Step-by-step explanation:

3 0
3 years ago
Other questions:
  • What answers go to these questions
    6·1 answer
  • A solid exerts a force of 400 N. The pressure exerted by the solid on a surface, if area of contact is 2m2 will be
    9·1 answer
  • What is the sign of B+A
    7·1 answer
  • What is the answer to the problem. <br> 4c-6=2
    9·2 answers
  • Trying to solve y + 4 = -5/3(x-5) Do I get y = -5/3x + 25/3 or do I multiply everything by 3 to get -15x + 21? Provide how.
    14·1 answer
  • You are fishing and are allowed to catch at most 3 striped basses. Each striped bass must be no less than 18 inches long. a. Wri
    6·1 answer
  • Having trouble on this ixl
    5·1 answer
  • Help me with my test
    8·2 answers
  • 3∣a−b∣ if a=−9 and b=3
    12·1 answer
  • H(x) =-4x+ 3; Find h(x-1)
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!