Mathematics College

Evaluate the expression 21 + 2w for / = 5.7 and w = 6.2. Enter your answer in the box.
6.2

Evaluate The Expression 21 + 2w For / = 5.7 And W = 6.2. Enter Your Answer In The Box.6.2

Answers

Answer 1

Answer:

23.8

Step-by-step explanation:

2l+2w for l=5.7 and w=6.2

2*5.7+2*6.2 first multiply

11.4+12.4 then add

23.8

Related Questions

-4.75=z/2

PLEASE HELP............

Answers

Answer: Z= -9.5

Step-by-step explanation:

write the division as a fraction

-4.75=1/2Z

Multiply both sides of the equation by 2

-9.5=Z

then swap the sides of the equation

Z= -9.5

And if they are asking for fraction form then its either

Z= - 19/2, or Z= -9 1/2

help me pls pls pls

Answers

Answer: 11/50
0.22 is 22/100, and you simplify it to 11/50

Answer:

11/50

Step-by-step explanation:

22/100 can b reduced to 11/50 :)

Forty percent of students at a small college have brought their own personal computer to campus. A random sample of 120 entering freshmen was taken.
a. What is the standard error of the sample proportion bringing their own computer to campus.
b. What is the probability that the sample proportions is less than 0.33?
c. What is the probability that the sample proportion is between 0.38 and 0.46?

Answers

Answer: a. Standard Error = 0.045

              b. P (p-hat<0.33) = 0.0606

              c. P (0.38<p-hat<0.46) = 0.5782

Step-by-step explanation: The sample proportion is p-hat=0.4

a. Standard error of a sample proportion is calculated as:

[tex]SE=\sqrt{\frac{p(1-p)}{n} }[/tex]

with p=0.4 and n=120:

[tex]SE=\sqrt{\frac{0.4(1-0.4)}{120} }[/tex]

[tex]SE=\sqrt{0.002}[/tex]

SE = 0.045

The standard error of the sample proportion of students bringing their own computer is 0.045.

b. To determine the probability for sample proportions, first find the z-score:

P(p-hat < x) = [tex]P(z<\frac{x-\mu}{SE})[/tex]

[tex]P(p-hat<0.33)=P(z<\frac{0.33-0.4}{0.045} )[/tex]

P(p-hat < 0.33) = [tex]P(z<-1.55)[/tex]

Now, using z-score table, find the probability:

[tex]P(z<-1.55)[/tex] = 0.0606

Probability the sample proportion is less than 0.33 is 0.0606.

c. For probability between two proportions, find z-score for each number of the interval:

For p < 0.38:

P(p-hat < 0.38) = [tex]P(z<\frac{0.38-0.4}{0.045} )[/tex]

P(p-hat < 0.38) = [tex]P(z<-0.44)[/tex]

Using z-score table,

[tex]P(z<-0.44)[/tex] = 0.33

For p < 0.46:

P(p-hat < 0.46) = [tex]P(z<\frac{0.46-0.4}{0.045} )[/tex]

P(p-hat < 0.46) = P(z < 1.33)

Probability is

P(z < 1.33) = 0.9082

The probability of the interval is the difference of each probability:

P(0.38 < p-hat < 0.46) = [tex]P(z<1.33)-P(z<-0.44)[/tex]

P(0.38 < p-hat < 0.46) = [tex]0.9082-0.33[/tex]

P(0.38 < p-hat < 0.46) = 0.5782

Probability the sample proportion is between 0.38 and 0.46 is 0.5782.

Mrs. Cole told Cameron that the score on his current quiz was 40% better than his previous. If Cameron had a score of 50 on his previous quiz, what is his current quiz score?

Answers

Answer:

70

Step-by-step explanation:

This may be 2 hours ago but at least I know what to do. You can just add 50 + 40%! 40% being .4 and 50 staying the same is in fact 70.

he got a 70.

I WILL MARK BRAINIEST
I already did the other ones I just need help with the one I got wrong

Answers

Okay so you know the perimeter of the first is 180 yards, and it costs $6 per foot to install the fence.

180 yards is 540 feet.

Therefore the price to surround the forest is:

$6 x 540

= $3,240

Andre received and spent money in the following ways last month.Write a positive or negative number to represent money from his perspective. "Andre spent $10 on a book"

Answers

Step-by-step explanation:

Let the amount of money Andre has be $A.

Spending $10 on a book = A - 10

If you like to venture further, feel free to check out my insta (learntionary). I'll be constantly posting math tips and notes! Thanks!

What is the value of (h o k)(2)

Answers

Answer:

-3

Step-by-step explanation:

h(k(2)) = h(k(x=2)) = h(-2) = h(x= -2)= 3/( -2+1) = 3/-1= -3

Answer:

-3

Step-by-step explanation:

Sorry if I'm wrong.

what is y equals 5 times x equal ​

Answers

Answer:

multiple possibilities

Step-by-step explanation:

Y=5x

yx=5

it is unsolvable but have various possible answers:

y=5

x=1

(vise versa)

————

y=2.5

x=2

(vise versa)

Which algebraic expression represents 10 less than a number?

A) n + 10
B) 10 - n
C) n - 10
D) 10n

Answers

Answer:

b

Step-by-step explanation:

b

C) n-10 because when the phrase “less than” is used you bring the number behind the variable.

Which list of elements is arranged in order of increasing atomic number?
Sr, Ca, Mg, Be

F, Cl, Br, I

B, C, Li, Be

Sc, V, Ti, Cr

Answers

Answer:

B. F, Cl, Br, I

Step-by-step explanation:

The atomic nunbers are 9, 17, 35, 53

Have a good day!

2. Karen bought a new car in 2001 for $34,000.00 She sold it in 2015 for $19,000.00. What was the percent of decrease? (round to whole percent)

Answers

Sorry I don’t know the sender maybe someone else can answer

Which number is composite?
53, 81, 41, 47,31
O41
81
31
47
Pls hurry its a test

Answers

Answer:

81

Step-by-step explanation:

A composite number is a number that can be divisible by more than 1.

81 can be divisible by 1 and 9.

-kiniwih426

6. In one state, sales tax is 6%. If sales tax on a car is $564.00, find the
price of the
car before tax.

Answers

Answer: $9400

Step-by-step explanation:

.06x = $564

divide both sides by .06

x = $9400

5/6 x 9/10 simplified

Answers

The answer is 45/60 but simplified is 3/4. :)

the product of a number and four​

Answers

the answer would be -10

Use the distributive property to write the next step in simplifying the equation.
Use the asterisk symbol (*) to represent multiplication.
-1(8 + x) = 7

Answers

after this step:
1. 8+x=7 multiply both sides by -1
2. x=-7-8 move the constants to the right
3.x=-7-8 Calculate
4. x=-15

Louise puts 11.7 gallons of gas in her car for a total of $27. What did the gasoline cost per gallon? Round your answer to the nearest cent

Answers

I got $2.31 per gallon

Answer:

$2.31

Step-by-step explanation:

You divide 27 by 11.7 to find cost per gallon, and get 2.30769230769  but it says to round to nearest cent so you round to 2.31

What is the slope-intercept equation of this line?
(0,4)
(2,-2)
A. y=-3x + 4
B. y = 4x - 3
C. y = 3x + 4
D. y = - 1/3 x+4

Answers

Answer:

A

Step-by-step explanation:

use both points to find the slope using the equation

y2-y1/x2-x1, so , -2-4/2-0 = -6/2 = -3. slope or m = -3

then the y int can be any y point, so either -2 or 4. in this case they used 4.

Write -16.3 as a mixed number.

Answers

Answer:

-690/1000

Step-by-step explanation:

The answer is negative 690/1000

Evaluate the function f(x) = -4x + 2, when x = -1.
A. f(x) = -4
B. f(x) = -2
C. f(x) = 2
D. f(x) = 6

Answers

Answer:

Option D

Step-by-step explanation:

f(x) = -4x + 2

f(-1) = -4(-1) + 2 = 4 + 2 = 6

The price of a new car is $20,000. If the sales tax rate is 6%, then how much sales tax is being charged?

Answers

Answer:

1,200

Step-by-step explanation:

1,200 should be the answer

the line passing through the points (-2,12) and (3, -23) intersects the line passing through which of these pairs of points

Answers

Answer:

Options (1), (2) and (3)

Step-by-step explanation:

To solve this problem we will use the property,

"A system of equations will have a unique solution if slopes of the linear equations are different"

Slope of a line passing through two points [tex](x_1,y_1)[/tex] and [tex](x_2,y_2)[/tex] = [tex]\frac{y_2-y_1}{x_2-x_1}[/tex]

Slope of a line passing through (-2, 12) and (3, -23) = [tex]\frac{12+23}{-2-3}[/tex] = (-7)

Option (1)

Slope of a line passing through (-4, 17) and (5, -28) = [tex]\frac{17+28}{-4-5}[/tex] = (-5)

Option (2)

Slope of a line passing through (-2, 16) and (2, -20) = [tex]\frac{16+20}{-2-2}[/tex] = (-9)

Option (3)

Slope of a line passing through (-6, 14) and (4, -16) = [tex]\frac{14+16}{-6-4}[/tex] = (-3)

Option (4)

Slope of a line passing through (-3, 19) and (6, -44) = [tex]\frac{19+44}{-3-6}[/tex] = (-7)

Option (5)

Slope of a line passing through (-5, 32) and (3, -24) = [tex]\frac{32+24}{-5-3}[/tex] = (-7)

Slopes of options (1), (2) and (3) are different.

Therefore, Options (1), (2) and (3) will be the correct options.

Simplify completely ASAPP

Answers

Answer:

5[tex]\sqrt{2}[/tex]

Step-by-step explanation:

-5m-3m+6-3 = -13 Need help

Answers

Answer: m=2

Step-by-step explanation:

-5m-3m+6-3=-13

-8m+3=-13

-3 -3

-8m/-8 = -16/-8

m=2

Brett shaded 4/8 of a sheet of notebook paper. Aisha says he shaded 1/2 of the paper. Are the two fractions equivalent? if so, what is another equivalent fraction

Answers

Answer:

60

Step-by-step explanation:

48

12

60

MMM HEY PLEASE HELP. IM LITERALLY ABOUT TO END MYSELF.

Answers

Answer:

do not end urself please ur a good guy

Step-by-step explanation:

it's b not d

Order the steps to solve -3x + 2.4 = 19.2.

1. Simplify to -3x=16.8
2. Divide both sides by -3
3. Simplify to x=-5.6
4. Subtract 2.4 from both sides

Quickly pls I’ll give brainliest

Answers

Answer:

1. Subtract 2.4 from both sides

2.Simplify to -3x=16.8

3.Divide both sides by -3

4. Simplify to x=-5.6

help asap plsplspls!! :)

Answers

Answer:

1.7

Step-by-step explanation:

1 + 7/10

= 1 + 0.7

= 1.7

1.7 is the correct answer

What two numbers add together give me -9 but multiply together give me 18

Answers

Answer:

one number is -6 and other is-3

Step-by-step explanation:

follow me

Factor f(x)= 2x^4 -12x^3 +6x +20x

Answers

Answer:

f(x)= 2x(x^3-6x^2+13)

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