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
timofeeve [1]
3 years ago
8

4.7+x=3.1 Solve for x . x=

Mathematics
2 answers:
inn [45]3 years ago
7 0
X=  -1.5 

4.7 + X = 3.1 
move the x and it becomes 
4.7 = 3.1- X 
then divide 4.7 by 3.1. then you get 1.5 but you cannot have a negative variable so you make the 1.5 negative !
Harman [31]3 years ago
5 0
<span>4.7 + x = 3.1

Subtract 4.7 from both sides to isolate x

x = 3.1 - 4.7 = -1.6</span>
You might be interested in
Shirley spelled 12 of her 16 spelling words correctly on the test. What percent grade did shirley get on the test
Black_prince [1.1K]

Answer:

75%

Step-by-step explanation:

percent = part/whole * 100%

percent = 12/16 * 100%

percent = 0.75 * 100%

percent = 75%

Answer: 75%

5 0
3 years ago
A population of size 320 has a proportion equal to .60 for the characteristic of interest. What are the mean and the standard de
tiny-mole [99]

Answer:

The answer is c.) 0.6 and 0.14

Step-by-step explanation:

Given population has a size of 320.

The proportion of population = 0.6

The mean of population, p = 0.6

The mean of sample, \hat{p}= 0.6

Therefore \hat{q}  = 1 - \hat{p} = 1 - 0.6  = 0.4

The sample size  = 12

Therefore the standard deviation of the sample,

s = \sqrt{\frac{\hat{p}(1 - \hat{p})}{n} }  = \sqrt{\frac{0.6 \times 0.4}{12} }  = 0.1414

The mean and the standard deviation for a sample size of 12 are 0.6 and 0.14 respectively.

The answer is c.) 0.6 and 0.14

6 0
3 years ago
Derive the equation of the parabola with a focus at (6, 2) and a directrix of y = 1
geniusboy [140]

Answer:

Step-by-step explanation:

eq. of directrix is y-1=0

let (x,y) be any point the parabola.

then\sqrt{ (x-6)^2+(y-2)^2}=\frac{y-1}{(-1)*2}

squaring

x²-12x+36+y²-4y+4=y²-2y+1

x²-12 x+40-1=4y-2y

2y=x²-12x+39=x²-12x+36+3

(x-6)²=2y-3

5 0
3 years ago
Another middle schooler (Swimmer 2) swims 24 laps in 20 minutes, what is the unit rate?
prohojiy [21]

Answer:

1.2 laps per minute

Step-by-step explanation:

divide laps/minutes.

6 0
3 years ago
Proving theorems about triangles
daser333 [38]

Answer:

Step-by-step explanation:

. should be a right angle triangle,

. must have 2 sides given

7 0
3 years ago
Other questions:
  • Which composition of transformations would be the inverse of rotating a figure 90° counterclockwise and then reflecting it over
    12·2 answers
  • The number 6 is a member of which four groups of real numbers?
    9·1 answer
  • Whats 2+2tgggggvvvvvvv
    11·2 answers
  • There are five Oklahoma State Officials: Governor (G), Lieutenant Governer (L), Secretary of State (S), Attorney General (A), an
    8·1 answer
  • Can somebody help me with this :) ??
    14·1 answer
  • A helicopter is flying from Hong Kong to Jakarta. The latitude of Jakarta is -6.20°, and its longitude is 106.80°. The latitude
    7·2 answers
  • To the nearest square unit, what is the area of the regular octagon shown<br>below?​
    8·2 answers
  • Which equations are equal to 1/4 (8x+56) =20
    5·1 answer
  • What is the value of x?
    8·1 answer
  • Need help asap!! i am being timed!!
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!