Kevin answered 80% of the questions on his test correctly. if he answered 20 questions correctly. how many total questions were the test?​

Answer: x in top right = 90°

x in bottom left = 90°

Step-by-step explanation:

The vertical angle of 110° = 110°. That angle is corresponding to x + 20°

110° - 20° = 90°

We know all of the interior angles of the triangle because:

1. Vertical angle to 20° = 20°

2. Supplementary angle to 110° = 70°

3. Other angle = 180 - 20 - 70 = 90°

The supplement to 90° = 90° , so the x in the bottom left = 90°

I am not a professional, simply using prior knowledge!

Note- It would mean the world to me if you could mark me brainliest!

Answer:

a) 26.79%, b) 50.42% and c) 22.79%

Step-by-step explanation:

a. What is the probability that both Dave and Mike will show up?

As decisions of showing up can be assumed to be independent, the probability will be given by

(1-0.53)(1-0.43)=(0.47)(0.57)=0.2679=26.79%

b. What is the probability that at least one of them will show up?

There are two possibilities for this to happen:

Dave shows up but Mike does not. The probability of Dave to show up is (1-0.53)=0.47 and the probability that Mike does not is 0.43. Then, as these events are independent, the probability for both of them to happen is (0.47)(0.43)=0.2021=20.21%

Mike shows up but Dave does not. The probability of Mike to show up is (1-0.43)=0.57 and the probability that Mike does not is 0.53. Then, as these events are independent, the probability for both of them to happen is (0.57)(0.53)=0.3021=30.21%

Therefore, the probability that at least one of them will show up? is 20.21%+30.21%=50.42%.

c. What is the probability that neither Dave nor Mike will show up?

As decisions of showing up can be assumed to be independent, the probability will be given by

(0.53)(0.43)=0.2279=22.79%

Answer:

The answer is B.

hope this helps

have a good day :)

Step-by-step explanation:

v=pi*r^2h

Answer:

5626.9m³

Step-by-step explanation:

V = πr²h

radius = 8

height = 28

to make it easier first step is to get the multiply the radius and the height but first multiple the radius by itself

=> 8 x 8 = 64

=> 64 x 28 = 1792

then multiply 1792 by π (3.14)

=> 1792 x 3.14 = 5626.88

when you round the answer it will be 5626.9

hope this helps and is right :)

Answer:

12x^7+7x^6-10x^5

Step-by-step explanation:

(X^4)(12x³+15x²-8x²-10x)

(X^4)(12x³+7x²-10x)

12x^7+7x^6-10x^5

Answer:

A=πr2=π·52≈78.53982m²

Step-by-step explanation:

Answer:

78.57 m^2

Step-by-step explanation:

answer is 78.57

Answer:

68.30200

Step-by-step explanation:

The exact quotient of 68,302 ÷ 1000 is 68.302.

An expression is a way of writing a statement with more than two variables or numbers with operations such as addition, subtraction, multiplication, and division.

Example: 2 + 3x + 4y = 7 is an expression.

We have,

68,302 ÷ 1000

= 68,302 / 1000

= 68.302

Thus,

The quotient is 68.302.

Learn more about expressions here:

https://brainly.com/question/3118662

#SPJ5

Answer:

The missing part of the triangle should be 7

Step-by-step explanation:

Hope this Helped

Answer:

210, 1

Step-by-step explanation:

LCM =210.

HCF or GCF =1

Answer: The first one

Step-by-step explanation:

-6c + 11d = 20

-6c + 11d = 20

They're the same equation meaning they'll be on the same line. They would have infinite solutions.

Answer: The first one

Step-by-step explanation:

-6c + 11d = 20

-6c + 11d = 20

Answer:

wag na baka imyday mo pa

Step-by-step explanation:

hahahahahahahahahahahahahahahahahaahhaahahahahahhahahahahahahahahahahahahahahahahahahahahahahahahhahahahah ahahahahahahaha ahahahahahahaha ahahahahahahaha hahahahahah ahahahahahahaha

do you mean numbers 5 6 7 8 9 10

Answer:

Every number except for 0, 1,2,3

Answer:

multiply each decimal

Step-by-step explanation:

Answer:

1.144

Step-by-step explanation:

multiply 1.1x0.8x1.3

Given:

[tex]4,4+2x,4+4x[/tex] are in geometric sequences​.

To find:

The value of x.

Solution:

If a, b, c are in geometric sequences​, then

[tex]\dfrac{b}{a}=\dfrac{c}{b}[/tex]

[tex]b^2=ac[/tex]           ...(i)

It is given that [tex]4,4+2x,4+4x[/tex] are in geometric sequences​. By using (i), we get

[tex](4+2x)^2=(4)(4+4x)[/tex]

[tex]4^2+2(4)(2x)+(2x)^2=(4)(4)+4(4x)[/tex]

[tex]16+16x+4x^2=16+16x[/tex]

[tex]4x^2=16+16x-16-16x[/tex]

On further simplification, we get

[tex]4x^2=0[/tex]

[tex]x^2=0[/tex]

[tex]x=0[/tex]

Therefore, the value of x is 0.

Answer:

$1408

Step-by-step explanation:

64 * 22 = 1408

Answer:

1408

Step-by-step explanation:

22x64=1408

Hope this helps!!!!

Answer:

Step-by-step explanation:

He needs 2.5 cm of ribbon left or in easier words 6 cm..-

Answer:

57

Step-by-step explanation:

Answer: 57

Step-by-step explanation:

1. Calculate what's in the parentheses first

(4 * 15) = 60

(60) - 3 = ?

2. Exponents (Powers, Roots) before you Multiply, Divide, Add or Subtract

Not applicable for this problem.

3. Multiply or Divide before you Add or Subtract

Not applicable for this problem.

4. For anything else left, just go from left to right

60 - 3 = 57

If you want to remember the shortcut; PEMDAS

P  - Parentheses first

E  - Exponents (Powers and Square Roots, etc.)

MD  - Multiplication and Division (left-to-right)

AS  - Addition and Subtraction (left-to-right)

Remember that:

Divide and Multiply rank equally (and go left to right).

Add and Subtract rank equally (and go left to right)

Answer:

it's really hard to see the numbers.. but I can explain how to do it. the 5 is on the x axis and the 0 is on the y axis. if you from 0 to 5 on the x axis and the line crosses through that point then it is true.

Answer:

The solution is 1,8

Step-by-step explanation:

[tex] \sf 180 \% \\ = \sf \frac{180}{100} \\ = \sf 1.8[/tex]

Answer:

John sells candy at the lowest price.

Step-by-step explanation:

If John sells 6 candies at 10$, then that's what's called a ratio between the price and the candy. We can double the amount of candy and the price to $20 for each 12 candies, $30 for 24, $40 for 36, etc. But it would still maintain the ratio of 6 candies for each 10$. Adam however, sells candy at 13 pieces for $20. We can divide the ratio down to 6.5 candies for 10$. But since we "can't" split a candy in half, we'll round it to 7 pieces for 10$, which costs more than 6 for 10$: Therefore, John sells candy at the lower price.

Given:

The table for a linear function.

To find:

The equation of the linear function.

Solution:

If a linear function passes through two points, then the equation of linear function is:

[tex]y-y_1=\dfrac{y_2-y_1}{x_2-x_1}(x-x_1)[/tex]

Consider any two points from the given table. Let the two points are (2,-2) and (4,0). So, the equation of linear function is

[tex]y-(-2)=\dfrac{0-(-2)}{4-2}(x-2)[/tex]

[tex]y+2=\dfrac{2}{2}(x-2)[/tex]

[tex]y+2=x-2[/tex]

Subtracting 2 from both sides.

[tex]y+2-2=x-2-2[/tex]

[tex]y=x-4[/tex]

So, Ethan 's made a mistake. The sign between x and 4 must be negative but in Ethan's equation it is a positive sign, which is not correct.

Therefore, the required linear equation is [tex]y=x-4[/tex].

Answer:

im pretty sure the answer is c

Answer:

10:55

Step-by-step explanation:

15:55 - 5 = 10:55

Answer:

360

Step-by-step explanation:

&$5%4645$655$456&&&66

Answer:

k= 2b/q

Step-by-step explanation:

see pic for explanation

Answer:

Step-by-step explanation:

y = (x² - 8x) + 10

Complete the square

 coefficient of the x term: -8

 divide it in half: -4

 square it: (-4)² = 4²

 use 4² to complete the square and keep the equation balanced:

y = (x²-8x + 4²) - 4² + 10

y = (x-4)² - 6

Answer:

y = (x - 4)² - 6

Step-by-step explanation:

use the 'completing the square' method:

x² - 8x + 10 = 0

x² - 8x + 16 = -10 + 16

(x - 4)² = 6

y = (x - 4)² - 6

Answer:

6.75 times 5 would be 17.1

Step-by-step explanation:

Heya, how are you doing today ^-^