a student earned a grade of 80% on a math test that had 20 problems how many problems on this test did the student answer correctly

Answers

Answer 1

Answer:

16

Step-by-step explanation:

To find 80% of 20, multiply .80 x 20

.80×20 = 16

This is how you multiply percentages--put the decimal point 2 places to the left, then multiply.  In this case, you're looking at 80%, so move the decimal point two places to the left

80.0 becomes .80

Then multiply that by the number you're trying to find the percentage of


Related Questions

What is the length of NM?

Answers

Answer:

See below :)

Step-by-step explanation:

We know that these traingles are all similar. We can see the angle NMK is 60 degrees so we also know that JNK is 60 degrees. Now we know that all of the triangles are 30-60-90 triangles. JN is 3, so from the "leg opposite to 30 degree theorem", we know that NK is two times JN which is 6. Then from the same theorem, we know that NM is NK divided by the square root of 3

[tex]\frac{6}{\sqrt3}[/tex]

We can't have fractions that have irrational numbers in the denominator of a fraction so we multiply it by root3 over root3

[tex]\frac{6}{\sqrt3}[/tex] * [tex]\frac{\sqrt3}{\sqrt3}[/tex]

This then makes it 6 times root 3 over 3

[tex]\frac{6\sqrt3}{3}[/tex]

We then get [tex]2\sqrt{3}[/tex]

Given f(x)= square root x and g(x) = lxl, which is the graph of (fog)(x)

Answers

Answer:

drawing the graph of [tex]f(g(x))=\sqrt{|x|}[/tex]

The graph is attached in the images below.

Option A is correct option.

Step-by-step explanation:

We are given:

[tex]f(x)=\sqrt{x}[/tex] and [tex]g(x)=|x|[/tex]

We need to find graph of  (fog)(x)

We know that (fog)(x)= f(g(x))

Placing x=g(x) i,e x=|x|

[tex](fog)(x)= f(g(x))\\f(g(x))=\sqrt{|x|}[/tex]

Now, drawing the graph of [tex]f(g(x))=\sqrt{|x|}[/tex]

The graph is attached in the images below.

Option A is correct option.

Answer:

The first graph

Step-by-step explanation:

A on edge

What is the slope of this line?
Enter
your answer as a whole number or a fraction in simplest
form in the box.
PLEASE HELP!! WILL MARK BRAINLIEST

Answers

Answer:

4/8 in simplist for would be 1/2

Step-by-step explanation:

t= u+v/2 for u

•u= 2t+v
•u= 2t/v
•u= 2(t-v)
•u= 2t-v

Answers

Answer:

u=2t-v

Step-by-step explanation:

t=(u+v)÷2 |×2

2t=u+v

-u=v-2t |:(-1)

u=-v+2t

u=2t-v

YOU HAVE A SWELLING INJURY. DO YOU USE….
Heat or ice?

Answers

Answer:

Ice would be the correct answer.

Answer:

if u want go to the doctor but use ice but if its to cold use a little heat not too much tho

Step-by-step explanation:

If you have injured your neck and are experiencing swelling, you should ice the area for at least 72 hours. After icing, you can use heat to help any lingering pain. Tight neck muscles and old injuries can benefit from heat only, as long as there isn’t any swelling.

SOMEONE PLEASE HELP ME OUT WITH THIS PLEASE PLEASE PLEASEE I WANT TO PASS AND I DONT KNOW THAT ANSWER

Answers

Answer:

A and D

Step-by-step explanation:

C

i gotta add words so i meat the 20 character limit :)

I need help on what a slope and y-intercept and how to find the equation

Answers

Answer:

y=mx+b is the slope intercept form.

Step-by-step explanation:

m is the slope (how the line is moving across the graph)

b is y-intercept (where the line crosses the y axis)

Hope this helps!

Plz helppppppp plzzzzz

Answers

Answer:

let me try

Step-by-step explanation:

if the dot means times it’s 2^72 but if it doesn’t then it will be 2^17 i may be wrong but that what i think it would be

write the equation of the ellipse graphed below.

ps. this is on Khan Academy’s ‘Ellipse standard equation & graph’

Answers

Answer: I am assuming its telling me to see where it is placed at so it would be (5,7).

I not for sure but I am pretty sure!

Good Luck!

2933445 + 9398988989

Answers

Answer:

9,401,922,434

Step-by-step explanation:

Answer:

the answer its 9.401.922.434

I hope helps you and if you want and consider you can give me a brainly crown

Answe please, which choice

Answers

Answer:

Both Reflectional and Rotational

Step-by-step explanation:

just say the answer pls and ty

Answers

Answer:

the answer pls and ty

4(3n-2)=what and explain by righting out. each step

Answers

Answer:

12n - 8

General Formulas and Concepts:

Pre-Algebra

Distributive Property

Step-by-step explanation:

Step 1: Define Expression

4(3n - 2)

Step 2: Expand

Distribute 4:                    4(3n) - 4(2)Multiply:                          12n - 8

Answer:

4(3n-2)

=> 12n-8

=> 12n=8

=> n=8/12

=> n= 2/3

SAVINGS Natalie has $250 in her savings accountinto which she deposits $10 of her allowance each week. The balance of her savings account can be modeled by the function f(w) = 250 + 10w , where w represents the number of weeks. Write a function g(w) to represent the balance of Natalie's savings account if she withdraws $40 to purchase a new pair of shoes. Describe the translation of f(w) that results in g(w) .

Answers

Answer:

[tex]g(w) = 210+ 10w[/tex]

Step-by-step explanation:

Given

[tex]f(w) = 250 + 10w[/tex]

[tex]Withdrawal = \$40[/tex]

Required

Determine g(w)

First, we'll write an expression for g(w)

From the question, we understand that she withdrew $40 from her account balance in w weeks.

This implies that:

[tex]g(w) = f(w) - 40[/tex]

Where f(w) is the account balance in w weeks and $40 is the withdrawn amount

Substitute 250 + 10w for f(w)

[tex]g(w) = 250 + 10w - 40[/tex]

Collect Like Terms

[tex]g(w) = 250 - 40+ 10w[/tex]

[tex]g(w) = 210+ 10w[/tex]

Recall that:

[tex]g(w) = f(w) - 40[/tex]

This means that function f(w) when shifter by 40 units downward, gives g(w)

What is the slope of the line on the graph?
Enter your answer in the box

I will brainlist thing to who ever answers this correctly

Answers

Given points (1,5) and (0,-1)
(-1-5)/(0-1) = -6/-1 = 6
The slope is 6

Answer:

none.

Step-by-step explanation:

if you examine the dots and solve, they are not equivalent

also it doesn't pass through the orgin

How many mililiters is 3.78 liters

Answers

Answer:

3780

Step-by-step explanation:

Help me with this problem please

Answers

you’re solving for y so it would be B

3/5 divided by 2 1/2

Answers

Step-by-step explanation: To divide mixed numbers, first rewrite the mixed numbers as improper fractions.

So here, 3/5 is already a fraction and 2 and 1/2 can be written as 5/2.

Remember that dividing by a fractions means the same thing

as multiplying by the reciprocal of that fraction.

In other words, 3/5 ÷ 5/2 can be rewritten as 3/5 · 2/5.

Finally, multiplying across the numerators and the

denominators, we have 6/25.

The result of the division of 3/5 divided by 2 1/2 is: 6/25.

Here, we have,

given that,

3/5 divided by 2 1/2

To divide mixed numbers, first rewrite the mixed numbers as improper fractions.

So here, 3/5 is already a fraction and 2 and 1/2 can be written as 5/2.

Remember that dividing by a fractions means the same thing

as multiplying by the reciprocal of that fraction.

In other words, 3/5 ÷ 5/2 can be rewritten as 3/5 · 2/5.

Finally, multiplying across the numerators and the

denominators,

we have 6/25.

To learn more on division click:

brainly.com/question/21416852

#SPJ6

A side of the triangle below has been extended to form an exterior angle of 156°. Find
the value of x

Answers

Answer:

x=24

Step-by-step explanation:

again 180-156=24

super easy remember exterior +interior angles add up to 180

Brainliest please

First angle = 105

Second angle = x

Third angle = 156 - 105

= 51

_________________________________________

Three angles of the triangle:

[tex]105[/tex]

[tex]x[/tex]

[tex]51[/tex]

___________________________________________

Angle sum of triangle = 180°

[tex]105 + 51 + x = 180[/tex]

[tex]156 + x = 180[/tex]

[tex]x = 180 - 156[/tex]

[tex]x = 24[/tex]

Does anybody know how to do that

Answers

Answer:

how to do what? there is no question attached

Step-by-step explanation:

there is no question attached

a keyboard that costs 475 is on sale for 175. How much money will you save buying it on sale?

Answers

Answer:

$300

Step-by-step explanation:

First, you subtract 475 and 175.

Which equals 300. That means that you saved $300.

Answer:$300

Step-by-step explanation:

475 (base price) - 175 (sale price)

=300 (saved price)

HELP PLEASE. what is the solution to this as an ordered pair. (algebra 1)

Answers

Answer:

(2 , 0)

I solved this using the comparison method ;)

Answer:

y=4×+6=56

56×65

45×34=

2×-4=67

What is the value of t in the equation 2t-8+4t-13=27

Answers

Answer:

t=8

Step-by-step explanation:

plz help asap i'll give brainlest

Answers

Answer:

X=11

Step-by-step explanation

[tex]5^{3+8} =5^{11}[/tex]=11

What is the value of x in the solution to this system of equations?

3x−6y=45

y=−2x+5

Answers

3x - 6(-2x+5) = 45 (substitutes y)
3x + 12x - 30 = 45
15x - 30 = 45
15x = 15
x = 1

Which of the following is the proper name for the figure below?
s
E
A. ADSK
B. ADKM
C. ADME
D. ADOM

Answers

Answer:

ADOM IS THE ANSWER OF THIS QUESTIONS


Which of the following inequalities matches the graph?

Answers

The answer is D, y < 4.

what is the answer?​

Answers

Answer: that’s super easy

Step-by-step explanation:

The answer is option a

8. Sheila buys two concert tickets from her friend.
She pays $90 for the two tickets. She looks at the
tickets and sees that each ticket has a face value
of $52.50.

B.What was the percent markdown, rounded to the nearest whole percent

Answers

Cost of two tickets that Sheila paid to her friend = $ 90

Actual price of 1 ticket = $ 52.50

So, actual price of 2 tickets = 52 x 2 = 105

Hence, markdown or discount Sheila's friend gave her is =

105 - 90 = 15

The answer is $15.

Answer:

15

Step-by-step explanation:

105 - 90 = 15

a tree of 14 m height is broken so that its top touches ground and makes an a 60 degeree.find the length of broken part of tree​

Answers

Answer:

98 - 24√3 is your answer dear.

Step-by-step explanation:

Let the length of broken part of the tree = 14 - x

For finding x

sin60° = √3/2 = x /14-x

14√3 - √3x = 2x

14√3 = 2x + √3x

14√3 = (2 + √3)x

x = 14√3/(2 + √3)x

after rationalisation

x = 24√3 - 84

substract it 14 - (24√3 - 84)

YOU'LL GET 98 - 24√3 WHICH IS YOUR ANSWER.

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