How can You use mental math for 878 + 534=

Answers

Answer 1
think of it like your drawing it in your head
in my head i would say 8+4=12 carry the 1 so 7+3+1= 11 carry the 1 then 8+5+ 1= 14 so the answer would be 1,412
Answer 2

Answer:

the answer would be 1412

Step-by-step explanation: Take the '4' in 534, add it to the 878 in your head. Thus resulting in 882. Then add the 30 to this number. After adding 30, you should get 912. Then add 500, and your answer is 1412.


Related Questions

I need to find the value of y

Answers

Answer:

x = 98

y = 126

Step-by-step explanation:

If you match triangle abc to triangle cde, you will match where x and y is.

168 ÷ 12 = 14

Now you multiply 14 by the other side lengths

9 • 14 = 126

7 • 14 = 98

It is similar to a dilation.

Which number is positive?
-87
-20
9
-6

Answers

Answer:

9 that is the answer.....

Answer:

the answer is 9

Step-by-step explanation:

the rest are negative numbers

Please help this is urgent and it's due today.

Answers

what is ?
there isn’t a picture

change 3/5 into decimal ​

Answers

Answer: 0.6

Step-by-step explanation: 3 divided by 5 is the same thing as 30/5 which equals 6. Just move the decimal place one to the left to get 0.6.

Hope this helps! :)

Answer: 0.6

Step-by-step explanation:

Divide 3 by 5, and you end up with the decimal 0.6

Find the 5th term for -12,-7,-2,3

Answers

the answer is 8

each time you add 5

-12 + 5 = -7
-7 + 5 = -2
-2 + 5 = 3
3 + 5 = 8

I REALLY NEED HELP WORTH 10 POINTS URGENT!!!!!

Answers

Answer:

[tex](f\circ g)(4)=31[/tex]

Step-by-step explanation:

Composite Function

Given f(x) and g(x) real functions, the composite function named fog(x) is defined as:

[tex](f\circ g)(x)=f(g(x))[/tex]

For practical purposes, it can be found by substituting g into f.

We have:

[tex]f(x)=3x+1[/tex]

[tex]g(x)=x^2-6[/tex]

Computing the composite function:

[tex](f\circ g)(x)=f(g(x))=3(x^2-6)+1[/tex]

Operating:

[tex](f\circ g)(x)=3x^2-18+1[/tex]

Operating:

[tex](f\circ g)(x)=3x^2-17[/tex]

Now evaluate for x=4

[tex](f\circ g)(4)=3(4)^2-17=48-17[/tex]

[tex]\boxed{(f\circ g)(4)=31}[/tex]

An alligator walks 6/7 of a mile in 3/4 of an hour. What is the unit rate

Answers

Answer: 2 miles per hour

Step-by-step explanation: This is a fraction equal to

6 miles ÷ 3 hours

We want a unit rate where

1 is in the denominator,

so we divide top and bottom by 3

6 miles ÷ 3

3 hours ÷ 3

=  

2 miles

1 hour

=  

2 miles

hour

= 2 miles per hour

nick and steph are each saving money to buy a bus ticket The total cost foe two tickets is $390 Steph current has $75 in her bank account and plans to savw $15 each week whick equation could she use to calculate the number of week (x) it will take her to save enough money to buy her ticket ​

Answers

Answer:

it will take 8 weeks

8 x 15 =120

120+75= 195

195x2= 390

mark the statements that are true

Answers

yeah me too loisksdkd

(5x+2) - (7x-8) simplify the following​

Answers

Answer:

-2x + 10

Step-by-step explanation:

Step 1: Write expression

(5x + 2) - (7x - 8)

Step 2: Distribute negative

5x + 2 - 7x + 8

Step 3: Combine like terms

-2x + 10

Answer:

-2x+10

Step-by-step explanation:

All you have to do is combine like terms.

can some please help me

Answers

Answer:

i think it is D

What is the slope ? 28 points

Answers

Answer:

It's -3/4

Step-by-step explanation: y2-y1/x2-x1

So (8-5)/((-2)-(-6))

The height of an Egyptian pyramid is 146.5 meters and its base is 230.38 meters. Find the slope of the face of a pyramid.

Answers

Answer:

[tex]Slope = 1.57[/tex]

Step-by-step explanation:

Given

[tex]Height = 230.38\ m[/tex]

[tex]Base = 146.5\ m[/tex]

Required

Determine the slope

Slope is calculated as thus:

[tex]Slope = Rise/Run[/tex]

In this case:

[tex]Rise = Height = 230.38 m[/tex]

[tex]Run = Base = 146.5 m[/tex]

So, we have:

[tex]Slope = 230.38 / 146.5[/tex]

[tex]Slope = 1.57[/tex] (approximated)

Simplify:
-2x-2x(5-4x)+3x(4-3x)

Answers

Answer:

−x⋅(17x−24)

Step-by-step explanation:

(-2x -  (2x • (5 - 4x))) +  3x • (4 - 3x)

 (-2x -  2x • (5 - 4x)) +  3x • (4 - 3x)

  24x - 17x2  =   -x • (17x - 24)

Here is a quote from an NPR news article: "On average, working-age adults were eating about 78 fewer calories per day in 2010, compared with five years earlier. The new report is based on data from the National Health and Nutrition Examination Survey, which collects details on eating habits and other health-related information from a nationally representative sample of about 10,000 people in the U.S." Which of the following is TRUE about the numerical value 78?

a. It is an anecdote.
b. It is a parameter.
c. It is a simulation.
d. It is a statistic.

Answers

Answer:

The answer is "Option d".

Step-by-step explanation:

It involves the use of quantitative templates, diagrams, or summaries in such a given set of experimental data or real-liability for research. This research method is used for gathering, analyzing, assessing, or making judgments.  

The statistics are mostly a summary description and the entire nation is represented in a parameter. It is 78 figure is a statistical figure based on a survey of 10,000 people, that's why choice d is correct.

I need help on this asap please.

Answers

Answer:

way to hard sorry cant help you

What is the unit rate of the oranges if I purchased 10 oranges for $2.50​

Answers

Answer:

.25 per orange

Step-by-step explanation:

2.5/10=.25

find the prime factorization of 30,031​

Answers

Answer:

30,031 is not a prime, is a composite number. Integer prime factorization, as a product of prime factors: 30,031 = 59 x 509.

Step-by-step explanation:

Let's learn by having an example, take number 220 and build its prime factorization.

0) We need the list of the first prime numbers, ordered from 2 up to, let's say, 100: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97. Prime numbers are the building blocks of the composite numbers' prime factorization process.

1) Start by dividing 220 by the first prime number in our list, 2 (start with the smallest prime number). We could have skipped the division by 2 if our number were an odd number, ie. 221.

220 ÷ 2 = 110; remainder = 0 => 220 is divisible by 2 (2 | 220) => 2 is a prime factor of 220. => 220 = 2 × 110.

2) Divide the result of the previous operation, 110, by 2, again:

110 ÷ 2 = 55; remainder = 0 => 110 is divisible by 2 (2 | 110) => 2 is once again a prime factor of 220 => 220 = 2 × 2 × 55.

3) Divide the result of the previous operation, 55, by 2, again:

55 ÷ 2 = 27 + 1; remainder = 1 => 55 is not divisible by 2.

4) Move on, divide 55 by the next prime number, 3 (notice that the sum of digits of 55 is 5 + 5 = 10 is not divisible by 3, so 55 is not divisible by 3):

55 ÷ 3 = 18 + 1; remainder = 1 => as we already said, 55 is not divisible by 3.

5) Divide 55 by the next prime number, 5:

55 ÷ 5 = 11; remainder = 0 => 55 is divisible by 5 (5 | 55) => 5 is yet another prime factor of 220 => 220 = 2 × 2 × 5 × 11.

6) Notice that the remaining number, 11, is also a prime number, so we've got already all the prime factors of 220.

7) Conclusion, 220 prime factorization: 220 = 2 × 2 × 5 × 11.

This can be written in a condensed form, in the exponent notation: 220 = 22 × 5 × 11.

what calculation is modeled on the number line?

Answers

Answer: I think it's-4/10 + (-7/10) = -1 1/5

Step-by-step explanation: number line

Answer:

-4/10 + (-7/10) = -1 1/5

If its incorrect ..........

Step-by-step explanation:

...........I need an image

How many hours are in 45 days

Answers

Answer:

Step-by-step explanation:

1,080 hours just multiply 24 and 45

what is the simplified radical of square root of 392?

Answers

Answer:

14 √2

Step-by-step explanation:

 Given expression:

             √392

Simplified radical = ?

Solution:

      392  = 8 x 49

    =  √8 x 49

    =   7√8

    =   7√4 x 2

    = 7 x 2√2

    = 14 √2

what are the possible rational zeros of f(x)=2x^3-15x^2+9x+22

Answers

Answer:

f'(x)=6×^2=30x+9

Step-by-step explanation:

take the derivative of both sides

use differentiation rule

calculate the derivative

simplify the expression

Which function has the domain x>-11?

Answers

Answer:

1

Step-by-step explanation:

-11 + 11 =0

0+1= 1

So it would be 1>-11

Answer:

A

y = [tex]\sqrt{x+11}[/tex] + 5

Step-by-step explanation:

For edge

question 12 I mark as brainliest ​

Answers

Answer: i think it’s A and D

What is the domain of g

Answers

Answer:

All real values of 'x'. i.e., the answer to the question is 'E'

Josh ran 33 miles this week.if he ran the same distance each day for 4 days,what distance did he run each day

Answers

He ran 8.25 miles each day
Ran 8.25 miles each day

4/6x 3/5 please help me will give brainliest

Answers

Answer:

0.4

Step-by-step explanation:

all I got to say is that the answer is 0.4 %100

plz help !! ty very much!!​

Answers

Your answer is A good luck

Answer:

EZ PZ A

Step-by-step explanation:

Since the 3 in in the thousands Place, Just multiply 3,000 by 100, and you get 300,000. Then just find the one that has a 3 in the one hundred thousands place which would be A.

− 2 3 y − 3 5 x + 2 9 − 4 5 x + 1 3 y Let x = 5 and y = 3. − 2 3 (3) − 3 5 (5) + 2 9 − 4 5 (5) + 1 3 (3) = −2 − 3 + 2 9 − 4 + 1 = −77 9 Use the work shown. Which expression is equivalent to Negative two-thirds y minus three-fifths x + StartFraction 2 over 9 EndFraction minus four-fifths x + one-third y? y minus four-fifths x + StartFraction 2 over 9 EndFraction minus two-thirds y minus one-fifth x Negative y minus four-fifths x + StartFraction 2 over 9 EndFraction + two-thirds y + three-fifths x One-third y minus StartFraction 7 over 5 EndFraction x + two-thirds minus two-thirds y minus StartFraction 4 over 9 EndFraction Two-thirds y minus StartFraction 7 over 5 EndFraction x + StartFraction 2 over 9 EndFraction + y

Answers

Answer:

c

Step-by-step explanation:

Answer:

yo

Step-by-step explanation:

its C  

trust me

i did edge

A recipe for salad dressing calls for 4 parts oil for every 3 parts vinegar.How much oil should you use to make a total of 28 teaspoons of dressing

Answers

Answer:

16 teaspoons

Step-by-step explanation:

4x4= 16 teaspoons

The amounts of oil and vinegar combined to make the salad dressing are

in a constant definite proportion.

The quantity of oil required to make 28 teaspoons of dressing is 16

teaspoons.

Reasons:

According to the question, 4 parts of oil are added to every 3 parts of

vinegar.

Therefore;

The ratio or proportion of oil to vinegar in the salad dressing is 4 : 3

4 : 3 = [tex]\dfrac{4}{3}[/tex]

The proportion of oil to vinegar is therefore;

[tex]\mathrm{Amount \ of \ oil = \mathbf{\dfrac{4}{3} \times \ Amount \ of \ vinegar}}[/tex]

Which gives;

[tex]\mathrm{Amount \ of \ vinegar= \dfrac{3}{4} \times \ Amount \ of \ oil}[/tex]

Let x represent the amount of oil required to make 28 teaspoons of dressing,

we have;

[tex]\mathrm{Amount \ of \ vinegar \ required = \dfrac{3}{4} \times x}[/tex]

Which gives;

[tex]\mathrm{x + \dfrac{3}{4} \times x = 28}[/tex]

[tex]\mathrm{x + \dfrac{3}{4} \times x = \dfrac{7}{4} \times x = 28}[/tex]

Therefore;

[tex]x = \dfrac{4}{7} \times 28 = \dfrac{4}{7} \times 7 \times 4 = 4 \times 4 = 16[/tex]

The amount of oil required to make 28 teaspoons of dressing, x = 16 teaspoons.

Learn more here:

https://brainly.com/question/20320243

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