A student answers 70% of the questions on a math exam correctly. If he answers 21 questions correctly , how many questions are on the exam ?

Answers

Answer 1

Answer:

There are 30 questions

Step-by-step explanation:

70%=21

70%÷7=10%

21÷7=3

10%=3

10%×10=100%

3×10=30

Hope this helped :)


Related Questions


PLEASEE HELP.!! ILL GIVE BRAINLIEST.!! *EXTRA POINTS* DONT SKIP:((

Answers

Answer:

okaaaay. this is 10 units to the y axis...

Step-by-step explanation:

you can use the method “rise over run”. wherever the line touches a new box is where you stop. in this case, you go up two and over one. meaning your slope is 2.

hey can you pls help!!!​

Answers

Answer:

60/4 if i get right can i please get brainliest?

Answer:

60 miles/ 4 gallons

Step-by-step explanation:

60 divided by 4 is 15

What happens when there is an unbalanced force acting?

This is for science

Answers

When there is an unbalanced force acting on an object, it changes its speed and/or direction of motion.

What on earth is: 1.92/3 = ? Please help me idk how to do this ;-;

Answers

Answer:0.64

Step-by-step explanation:

it’s 0.64. hope this helps lol

PLZ HELP! THIS IS THE LAST QUESTION! 75 PTS!!

Answers

Answer:

its b or d

Step-by-step explanation:

Answer:

its b

Step-by-step explanation:

I need to solve 11-20 ASAP pls

Answers

In num 11 the upper level just next to 26x-3 is 36x-3 and the lower level just next to 36x-3 is 26x-3 In num 20 the lower level of v is 96degrees so they prove the paralysme

Follow my Pinterest 13jadyn13

Answers

You know that seems very interesting

Which linear inequality is represented by the graph?

1 y 1/2x + 2
2 yx+2
3 y=x+2
4 y2 x + 2

Answers

Answer:

A

Step-by-step explanation:

The linear equation of inequality is y ≤ ( x/2 ) + 2

What is an Inequality Equation?

Inequalities are the mathematical expressions in which both sides are not equal. In inequality, unlike in equations, we compare two values. The equal sign in between is replaced by less than (or less than or equal to), greater than (or greater than or equal to), or not equal to sign.

In an inequality, the two expressions are not necessarily equal which is indicated by the symbols: >, <, ≤ or ≥.

Given data ,

Let the inequality equation be represented as A

Now , the value of A is

Substituting the values in the equation , we get

The x intercept of the equation is when y = 0

So , A ( -4 , 0 ) is the x intercept

And , the y intercept is when x = 0

So , B ( 2 , 0 ) is the y intercept

Therefore , the inequality is y ≤ ( x/2 ) + 2 and the graph is plotted

Hence , the inequality is y ≤ ( x/2 ) + 2

To learn more about inequality equations click :

https://brainly.com/question/11897796

#SPJ7

6x^2 – 13x + 6 = 2x^2 solve using quadratic formula

Answers

Answer:

[tex]x=\frac{13\pm\sqrt{73} }{8}[/tex]

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDASEquality Properties

Algebra I

Standard Form: ax² + bx + c = 0Quadratic Formula: [tex]x=\frac{-b\pm\sqrt{b^2-4ac} }{2a}[/tex]

Step-by-step explanation:

Step 1: Define equation

6x² - 13x + 6 = 2x²

Step 2: Rewrite in Standard Form

Subtract 2x² on both sides:                    4x² - 13x + 6 = 0

Step 3: Define

a = 4

b = -13

c = 6

Step 4: Solve for x/roots

Substitute:                              [tex]x=\frac{13\pm\sqrt{(-13)^2-4(4)(6)} }{2(4)}[/tex]Exponent:                               [tex]x=\frac{13\pm\sqrt{169-4(4)(6)} }{2(4)}[/tex]Multiply:                                  [tex]x=\frac{13\pm\sqrt{169-96} }{8}[/tex]Subtract:                                 [tex]x=\frac{13\pm\sqrt{73} }{8}[/tex]

And we have our final answer!

A school wants to buy a chalkboard that measures 3 feet by 4 feet the chalkboard cost $6.14 per square foot. How much will the chalkboard cost

Answers

Answer:

$49.12

Step-by-step explanation:

?...

1 + (-2 - 5) to the 2nd power + -3 x 4​

Answers

Answer:

-3

Step-by-step explanation:

(1 + (-2-5))^2+-3X4

(1+(-3))^2 + -12

-3^2 -12

9-12

-3

Determine whether this has a maximum or a minimum.
A.
maximum
B.
minimum
C.
both
D.
Not Enough Information

Answers

Answer:

A). minimum

Step-by-step explanation:

In my opinion I think it’s A.... hopes this helps

Help me pleaseeeeee!!!!!

Answers

Answer:

A

Step-by-step explanation:

Help with a and b? Thank you

Answers

Step-by-step explanation:

 Given data:

         Cars      Vans    Others

          60          21          3

The data represents the number of cars on a single day.

Find the relative frequency;

It is the number of times an event occurs.

Here the time frame is within a day;

  Relative frequency = [tex]\frac{number of cars + number of vans + others}{number of days}[/tex]  

  Relative frequency  = 60 + 21 + 3  = 84vehicles per day

ii.

Number of vans in a week;

      Number vans  in a week  = 21van per day x 7 days  = 147vans

2x + 1 = 2x - 1 how many solutions?

Answers

Answer:

the answer is 2

Step-by-step explanation:

2.Yolanda is buying supplies for school. She buys n packages of pels at $1.40 per package and m pads of paper at $1.20 each. What does each term in the expression 1.4n + 1.20m represent? What does the entire expression represent? Interpret the meaning of the term 1.4n. What does the coefficient 1.4 represent? Interpret the meaning of the term 1.20p. What does the coefficient 1.20 represent?

Answers

Answer: 1.4n represents the cost of n packages of pels.

1.20m represents cost of m pads.

Entire expression 1.4n + 1.20m represents total cost of n packages of pels and m pads.

Meaning of 1.4n  =  cost of n packages of pels.

Meaning of 1.20 m = represents cost of m pads.

where , 1.4 = Cost per package of pels

1.2 =Cost per pad of paper

Step-by-step explanation:

Given: Cost per package of pels = $1.40

Cost per pad of paper = $1.20

Number of packages of pels bought = n

Number of pads of paper bought = m

So, 1.4n represents the cost of n packages of pels.

1.20m represents cost of m pads.

Entire expression 1.4n + 1.20m represents total cost of n packages of pels and m pads.

Meaning of 1.4n  =  cost of n packages of pels.

Meaning of 1.20 m = represents cost of m pads.

where , 1.4 = Cost per package of pels

1.2 =Cost per pad of paper

7. A checking account is
overdrawn by $10 on both Friday
and Saturday. By how much was
The account overdrawn?

Answers

20$ because 10+10 is 20
20 dollars? because if you add up the $10 for Friday and Saturday, it makes $20 dollars. I may be wrong tho.

What is the correct order of the steps used to derive the identity?
A.) 4, 3, 5, 1, 2
B.) 4, 5, 3, 1, 2,
C.) 3, 4, 5, 1, 2
D.) 3, 4, 1, 5, 2

Answers

The correct order of the steps used to derive the identity is (A.) 4, 3, 5, 1, 2

How to determine the correct order of step?

The trigonometry identity is given as:

tan(2x)

When the tangent formula is applied, we have:

[tex]\tan(2x) = \frac{\sin(2x)}{\cos(2x)}[/tex] --- step 4

Expand sin(2x) and cos(2x)

[tex]\tan(2x) = \frac{2\sin(x)\cos(x)}{\cos^(x) - \sin^2(x)}[/tex] --- step 3

The option from the list that obey the above order is (a) 4, 3, 5, 1, 2

Hence, the correct order of the steps used to derive the identity is (A.) 4, 3, 5, 1, 2

Read more about trigonometry identity at:

https://brainly.com/question/7331447

#SPJ6

Answer:

A). 4,3,5,1,2

Step-by-step explanation: on edge

Tina has two rectangular playpens to keep her new pet dogs. The first rectangle has a width of 6 feet and a length of x - 4 feet. The second rectangle has a width of 8 feet and a length of x + 2 feet. What is the sum of the two perimeters?

Answers

Answer:

4x+24 ft.

Step-by-step explanation:

Perimeter of first rectangular playpen mentioned: 2(6+x-4), which can be simplified to 2(x+2) = 2x + 4.

Perimeter of second playpen mentioned: 2(8+x+2), which can be simplified to 2(x+10) = 2x+20.

Add these two together: 2x+4 + 2x+20 = 4x+24. Don't forget to add units: 4x+24 ft.

At the party ⅗ of a pie are eaten.
Jo eats ⅘ of what is left.
What fraction of the pie does Jo eat?
(could you show your work:))​

Answers

Answer:

1/10 of the pie

Step-by-step explanation:

Step-by-step explanation:

5/5-3/5=2/5

2/5-4/5 of itself

This leave 1/5 of 2/5

if we make this decimals then it becomes 0.40

0.40/5=0.08

or 8/100,4/50,2/25

what is the equation of the line containing the points (4,2) and (-5, 1)? Write your answer in slope-form. PPPPPLLLLLLLLLLLEEEEEEEEASE HELP

Answers

Answer:

y=-1/9x+2.44

Step-by-step explanation:

m=y2-y1/x2-x1

1-2=(-1)

(-5)-4=(-9)

-1/9

y=mx+b

2=-1/9(4)+b

-1/9*4=-0.44444444444

-0.444.... rounded is -0.44

(-0.44)-(-0.44) =0

2-(-0.44 )=2.44

y=-1/9x+2.44

hope this helps

sorry if im wrong i had a lil trouble on this one :(

can somone please help with this, will give brainliest.

Bamboo is one of fastestfastest-growing plants. A typical growth rate for bamboo in temperate climates is 3-10 centimeters per day during the growth season. Which of the following equations, where t represents time in days, L represents length in cm, which could be described of the growth of a bamboo plant?​

Answers

Answer: maybe c or d, but I could be wrong :/

Step-by-step explanation:

Can I get Help on explaination of this?

Answers

Answer:

The measure of the outside angle is the sum of the two inside angles:

68+52=120

Or you could do it the long way and find the third angle inside the triangle then do 180 minus that but this is easier.

Step-by-step explanation:

Is the following relation a function?


Need answer now

Answers

Answer: No, it is not a function

If you can draw a vertical line through more than one point on the curve, then it's not a function. In this case, we can draw such a line. The graph is said to have failed the vertical line test.

What this means is that some x inputs lead to more than one y outputs. A function is only possible if any x input leads to exactly one y output. The x input must be in the domain.

Answer:

It is not a function.

Step-by-step explanation:

A relation's inputs are not repeated in a function.

Since the graph fails the vertical line test, it is not a function.

See picture.

Hope this helps.

write QF if it's Quadratic function and NQF if Not a Quadratic function​

Answers

Answer:

1. QF2. NQF3.  NQF4. QF5. QF6. Undefined, unclear

Step-by-step explanation:

1. f(x) = x^2 + 2

It is a quadratic function as in the format of y = ax^2 + bx + c

2. f(x) = 2x - 10

It is linear function, not quadratic

3. It is linear function as y- is an arithmetic sequence

Not a quadratic function

4. As per the pairs we can determine the function:

y = 1/2x^2 + 1/2xIt is a quadratic function

5. The graph is parabola

It is a quadratic function

6. Undefined as not clear what is it

I need help getting my grades up, any help would be very appreciated

Answers

Answer:

I can help but it depends on what. I have pretty good grades

Step-by-step explanation:

Answer:

i can do history all the history u have i can do it no maps though no math i can also do language arts

Step-by-step explanation:

suppose that 65% of people have brown hair and 90% of the people are right handed
a) create an AREA MODEL OR TREE DIAGRAM
b)what is the chance a randomly chosen person has brown hair and is right-handed
c) what is the chance that a randomly selected person had brown hair or is left handed

Answers

a. 65/100 x 90/100
b. 58.5%
c. 65% for someone with brown hair and 10% for someone who is left handed. (If you’re talking about both then 6.5%)

help me wth ths qustion

Answers

Answer:

62

Step-by-step explanation:

im pretty sure this is right. sry if its not.

Answer:

62

Step-by-step explanation:

1) 10^3 = 1000

2) 1000 x .062=62

What is the permittee of the shaded figure ?? Please help

Answers

Answer: 96

Step-by-step explanation:

12x6= 96

times 12 which is the y axis and 6 which is the x axis. which would give you the shaded figure.

can someone please help me with this question​

Answers

Answer:

16 the answer

Step-by-step explanation:

Other Questions
When water changes from a gas in the atmosphere to a liquid droplet in a cloud, this is known asGroup of answer choicestranspirationcondensationevaporationprecipitation HELP I WILL MaRK BRAINLIEST Read the excerpt from Catching Sun Rays.But there is another benefit: switching to renewable energy can create jobs. One environmental group says solar power could mean hundreds of thousands of jobs in the United States. For example, the largest solar farm on the East Coast in New York created more than 200 local construction jobs. And the farm makes enough electricity each year to power 4,500 homes!Why does the evidence provided in the excerpt make the author's argument more effective? It is vague.It is specific.It is complicated.It is scientific. BAKIT KAILANGANG MABATID ANG PINAGDAANANG EBOLUSYON NG ORTOGRAPIYANG FILIPINO? Which statement best illustrates socialist ideas? Choose the ratio that is equivalent to 4:6.Group of answer choices3:64:88:128:10 Need help on this one. 1. T preparaste los entremeses o tu compaera los compr? (a2. Natalia se la la sirvi. (al cliente)3. Nos lo sirvieron. (el pollo)4. Andrea nos est preparando al estilo cubano. (los frijoles negros)5. El seor Campos me la present. (la duea del caf)6. Javier se va a dar a la camarera. (una propina)7. Bueno, te doy. (las respuestas)8. Ellos se contaron ayer. (la historia)9. La semana pasada los consegu. (a mis amigos)10.Necesito leche. la puedes traer? (a m) what are the components of salt solution? Where is the most appropriate place to put a hydroelectric generator? Point A, B, or C?EXPLAIN. Neutral atoms have the same number of____Whats the missing word? WHAT WAS THE DUMBEST THING YOU EVER DONE ME: CALLING 911 ON MY BROTHERS PHONE HOPEING THE POLICE DONT COMEAKA (THEY DIDNT) Plz help Asap!A serval, an African wildcat, leaps high above the ground to pounce on its prey. The height of the serval above the ground in relation to the horizontal distance it travels, both measured in feet, is modeled by the given function.What does the domain of the function represent in this situation?A. the horizontal distance the serval travels during its leapB. the height of the serval along the path of its leapC. the horizontal distance at which the serval reaches its maximum height above the groundD. the maximum height the serval reaches above the ground The price of a television was reduced from $250 to $200. What was the percent decrease in price? HELPP? ILL GIVE YOU A BRAINLLEST?!! If 6 x 7 = 26 +0, find the number that belongs in the box.211 What impact did warring states had on the people who lived in China? Essay writingstate the important thing you have learned about personal protective equipment. Why is ecological fallacy important In the human circulatory system, arteries carry blood away from the heart to different parts of the body. Veins carry blood from different parts of the body back to the heart. A scientist claims that the greater the amount of exercise a person performs, the greater the amount of oxygen (O2) the body uses. He records the oxygen concentration in the blood of people while they are riding an exercise bike. The graphs show the results of this investigation.a. Identify at least two systems within the human body that work together during exercise.b. Explain how the evidence from the data in the graphs supports or does not support the scientists claim. If a cell is placed in a _____ solution, it will cause the cell to swell. What country in Asia is off the northwestern coast of North America?