80% of the astronomy club members own a telescope. If 20 students own a telescope, how many students are in the astronomy club in all?
help me please I will give the brainliest

Answer:

the upper left Quadrant is Quadrant II

Answer:

its Quadrant IV

Step-its Quadrant by-step explanation:

Answer:

why is your cat screaming at you?

Step-by-step explanation:

Answer:

angle 13 is congruent to angle 10 (verticals)

angle 10 and angle 7 are opposites

angle 7 is congruent to angle 4 (verticals)

Answer:

20

Step-by-step explanation:

Answer:

20 i am telling the truth

Step-by-step explanation:

The number of nickels are 41 and the number of quarters are 27.

Given that, Angela has a collection of nickels and quarters worth $8.80.

A system of linear equations consists of two or more equations made up of two or more variables such that all equations in the system are considered simultaneously. The solution to a system of linear equations in two variables is any ordered pair that satisfies each equation independently.

We know that, a nickel is worth 5 cents and a quarter is worth 25 cents.

Let the number nickels be x and the number of quarters be y.

Now, 0.05x+0.25y=8.80 ----------(I)

x+y=68 ----------(II)

Substitute x=68-y in equation (I), we get

0.05(68-y)+0.25y=8.80

⇒ 3.4-0.05y+0.25y=8.80

⇒ 0.20y=8.80-3.4

⇒ 0.20y=5.4

⇒ y=5.4/0.20

⇒ y=27

Substitute y=27 in equation (II), we get

x=41

Therefore, the number of nickels are 41 and the number of quarters are 27.

To learn more about the linear system of an equations visit:

https://brainly.com/question/27664510.

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Answer:

4.5

Step-by-step explanation:

i think that is the answer

Answer:

D. (1,4) (1,9)

Because 9 - 4 = 5 so yea

Answer:

4-i

Step-by-step explanation:

right on edge

Answer:

4 - i

Step-by-step explanation:

Answer:

a= -3 + b + 5/z     Thats solved by factoring

let me k ow if you need more

Step-by-step explanation:

Answer:

1. subtract by 12 on both sides

2. Divide both sides by -8

Step-by-step explanation:

Answer:

c

Step-by-step explanation:

Answer:

It's C.

Step-by-step explanation:

Answer: 9.3

Step-by-step explanation:

Answer:

its 1.125

Step-by-step explanation:

well 2.25 divided by 3 is 1.125

Answer: D

Step-by-step explanation:

Answer: the Ferris Wheel

Step-by-step explanation:

Okay I'll go as fast as I can!!

1.) 0.05

2.) -0.007

3.) 0.028

4.) 0.125

5.) 2.333

6.) 0.272

7.) -0.6

8.) 0.086

9.) 0.642

10.) 0.296

11.) 0.068

12.) 0.814

13.) 2.08

14.) 3

15.) 0.093

16.) -0.185

I am so sorry! I dont know what 17 and 18 are. I feel bad but I hope you can figuar it out!

Answer:

The first equation is equal to 15 and the second one is equal to 16 . So the second equation is bigger.

Answer:

Use the drop-down menus to complete the statements.

What is 4 ÷  

1

3

?

This problem asks how many groups of  

1/3

are in  

4

.

The quotient of 4 ÷  

1

3

 is  

12

.

Step-by-step explanation:

The completed statements with respect to the parts on the number line are;

What is 4 ÷ 1/3; 12

This problem asks how many groups of 1/3 are in 4

The quotient of 4 ÷ (1/3) is; 12

A number line is a visual representation of the set of real numbers. A number line is a straight line on which each point corresponds to a number. The points on the line are evenly spaced, with the distance between two points representing the difference between the numbers.

The question asks how many groups of 1/3 are in 4, which is equivalent to dividing 4 by 1/3, which can be expressed as 4 ÷ 1/3

To divide a number by a fraction, we can multiply the number by the reciprocal of the fraction.

The reciprocal of a fraction is obtained by flipping the numerator and denominator. The reciprocal of 1/3 is 3/1 which is 3. The expression can therefore, be expressed as follows;

4 ÷ (1/3) = 4 × 3 = 12

The quotient of 4 ÷ (1/3) is 12, which indicates that the number of groups of 1/3 in 4 are 12

Learn more on number lines here: https://brainly.com/question/7721586

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Step-by-step explanation:

2×9n=18n

2×-6=-12

52-12+18n= 38 +18n

2×7n=14n

8×2=16

14n+16

38+18n=14n+16

subtract 14n from 14n and 18n

38+4n=16

subtract 38 from 38 and 16

4n=-22

divide each side by 4

n= -5.5

Answer:

Solution

=−6

Step-by-step explanation:

Answer:

thanks

Step-by-step explanation:

Answer:

thanks

Step-by-step explanation:

Answer:

The answer is 21

Step-by-step explanation:

21x4+2=86

Answer:

C) 21

Step-by-step explanation:

The given angles are vertical so they have the same measurement

4x + 2 = 86° subtract 2 from both sides

4x = 84 divide both sides by 4

x = 21

Answer:

Step-by-step explanation:

Let's solve your system by substitution.

3x−2y=7;y=x+2

Rewrite equations:

y=x+2;3x−2y=7

Step: Solvey=x+2for y:

y=x+2

Step: Substitutex+2foryin3x−2y=7:

3x−2y=7

3x−2(x+2)=7

x−4=7(Simplify both sides of the equation)

x−4+4=7+4(Add 4 to both sides)

x=11

Step: Substitute11forxiny=x+2:

y=x+2

y=11+2

y=13(Simplify both sides of the equation)

Answer:

x=11 and y=13

Answer:

i just looked it up and i saw 57 so i think thats it

Step-by-step explanation:

Answer:

9/4

Step-by-step explanation:

Answer:

Maria will spend $105.48 on all of the shirts.

Step-by-step explanation:

Multiply 8.79 by 12 :)

Answer:

105.48

Step-by-step explanation:

If each shirt costs 8.79 then you need to multiply 8.79 by 12 because she bought 12 shirts to get 105.48. I hope this helped!

Answer:

A simple example: Say that f(x) is x+1 and g(x) is x^2. While f(x)g(x) would be (x+1)x^2, f of g of x would be x^2+1. Continuing on with the same example, the f(x)g(x) derivative with the product rule would give x^2+2x(x+1), and the f of g of x derivative would be 2x.

Step-by-step explanation:

Really hope this could help - Good luck and have a nice day ^w

Answer:

[tex] \rm \: Find \: the \: derivative \: of \: t he \: function[/tex]

[tex] \rm \: f(x) = (3x - 2x^2)(5 + 4x).[/tex]

[tex] \rm \: Following \: the \: Product \: rule \: we \: have,[/tex]

[tex] \rm \: f ' (x) = (3x - 2x^2)(0 + 4) + (5 + 4x) (3 - 4x)=12x - 8x^2 + 15 + 12x - 20x - 16x^2= - 24x^2 +4x + 15[/tex]

Answer:

5400

Step-by-step explanation:

basic math

Answer:

5400

Step-by-step explanation:

Answer:

.32

Step-by-step explanation:

When converting percents to decimals, drop the percent sign, and move the decimal two places to the left.

~theLocoCoco

Answer:

A. 7.50+5.25= 12.75........

Answer:

C.

Step-by-step explanation:

Two bots 7.50 each

Three DVDs 5.25 each

2 x 7.50 = 15

3 x 5.25 = 15.75

15 + 15.75 = 30.75

$30.75

Answer:

True

Step-by-step explanation: