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
algol13
4 years ago
15

Solve for x: the quantity of x plus 4 all over 2 = 7.

Mathematics
1 answer:
iris [78.8K]4 years ago
4 0
The answer is x=10
First you multiply 7 and 2
the subtract 4 from both sides to get 10

You might be interested in
How much should you invest at 3% simple interest in order to earn $65 interest in 14 months?
Lostsunrise [7]

Answer:

The investment amount is approximately $63

Step-by-step explanation:

Formula:-

Simple interest I = PNR/100

P - Principle amount

N - Number of years

R - Rate of interest

It is given that,

To find the amount to be invest

we have,

P = ? N 14 months  = 7/6 years and R = 3%

P + PNR/100 = 65

P[1 + NR/100] = 65

P[1 + (7*3)/(6*100)] = 65

P[1 +7/200] = 65

P[207/200] = 65

P = (65*200)/207 62.801 ≈ 63

Therefore the investment amount is approximately $63

3 0
3 years ago
Read 2 more answers
Out of 2,000 random but normally distributed numbers with a mean of 45 and a standard deviation of x, approximately 1,360 number
Lilit [14]
Let Y denote the random variable representing a given number in the total set of numbers. We're told that \dfrac{1360}{2000}=0.68 of the numbers fall within a given range, so we know

\mathbb P(40\le Y\le50)=0.68

where Y is normally distributed with mean 45 and an unknown variance x^2.

Let's make the transformation to a random variable with a standard normal distribution:

\mathbb P\left(\dfrac{40-45}x\le\dfrac{Y-45}x\le\dfrac{50-45}x\right)=\mathbb P\left(-\dfrac5x\le Z\le\dfrac5x\right)

Since Z is symmetric, we have

\mathbb P(-\dfrac5x\le Z\le\dfrac5x\right)=2\mathbb P\left(0\le Z\le\dfrac5x\right)=2\bigg(\mathbb P\left(Z\le\dfrac5x\right)-\mathbb P(Z\le0)\bigg)

The mean of Z is 0, and by symmetry we know that exactly half of the distribution falls to the left of Z=0, so \mathbb P(Z\le0)=0.5. We're left with

0.68=2\mathbb P\left(Z\le\dfrac5x\right)-2\cdot0.5
\implies\mathbb P\left(Z\le\dfrac5x\right)=0.84

This probability corresponds to a value of Z\approx0.9945, which means

\dfrac5x\approx0.9945\implies x\approx5.0277
7 0
3 years ago
What is 1% of 11 plz help me!!!
e-lub [12.9K]

Answer:

0.11

Step-by-step explanation:

if 11=100 and thats 100% find 10% which is 1.1 so 1% would be 0.11 i think :) im not the greatest at maths but hope this helps :)

7 0
3 years ago
Read 2 more answers
Solve the triangle. round your answer to the nearest tenth
kirza4 [7]

Answer:

∡A =41°

~~~~~~~~~~~~

BC=21

~~~~~~~~~~~~~~

sin(24)/AC=sin(41)/21

AC=13

~~~~~~~~~~~~~~

sin(115)/AB=sin(41)/21

AB=29

Step-by-step explanation:

7 0
3 years ago
Can someone help me with these 2 questions? Pls explain
Trava [24]
#18. C. 1&3
This is be cause when you simplify to y=.. for 4y=3x and 8y=6x, they both turn out to be y=3/4x. The constant of proportionality is 3/4 because both equations simplify to have that as a constant.
#19. D
Kathy can add less than or equal to 7 books to her suitcase.

To cross off the first two choices(A&B), you input a number above 7 and then multiply it by 1 3/4 . Add it to 37 1/2 and it will be more than 50, meaning it will not fit since the suitcase can’t have more than 50 pounds in it.

To cross off C, you would multiply 1 3/4 by 7 and get 12.25. Add 12.25 to 37 1/2 and you will get 49.75 . This result would mean that you can have less than 7 books or just 7 books, leaving the answer to be D.
8 0
3 years ago
Other questions:
  • Can someone help me please? <3 The width w of a rectangular swimming pool is 7x^2. The area A of the pool is 7x^3 _ 42x^2. Wh
    11·1 answer
  • How do you write The product of 2 and a cube of a number
    13·1 answer
  • Which of the following represents a perfect square trinomial?
    13·2 answers
  • Write the digits that make each equation true
    15·1 answer
  • Price of a jeep dropped from 27000 to 22900. What was the percent decrease in price nearest hundredth percent?
    13·2 answers
  • What is the range in math?<br> 1 3 2 7 1 0 9
    6·2 answers
  • Evaluate the expression when a=3 and c = -2. C-5a
    7·1 answer
  • Will give brilintest if u answer correctly plz
    13·2 answers
  • Given: RW ≅ WT; UW ≅ WS Prove: RSTU is a parallelogram. Quadrilateral R S T U is shown. Diagonals are drawn from point S to poin
    11·2 answers
  • Give a description of a 3/4 turn of the minute hand on a clock face.
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!