1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
lys-0071 [83]
3 years ago
7

How can You use mental math for 878 + 534=

Mathematics
2 answers:
antoniya [11.8K]3 years ago
6 0
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
Alex Ar [27]3 years ago
4 0

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.

You might be interested in
7. Write an equation for the line that is parallel to the given line and that passes through the given point.
Vlad1618 [11]

Answer:

C. y = 1/2x - 14

Step-by-step explanation:

Find the slope of the original line and use the point-slope formula  y − y 1 = m ( x − x 1 )  to find the line parallel to  y = 1 /2 x − 8 .

y = 1 /2 x − 14                              PARALLEL

...................................................................................................................................................

Find the negative reciprocal of the slope of the original line and use the point-slope formula  y − y 1 = m ( x − x 1 )  to find the line perpendicular to  y = 1 /2 x − 8 .

y = − 2 x − 29                               PERPENDICULAR

8 0
2 years ago
What’s the answer ?
In-s [12.5K]

Answer

one answer can be x = 30

Step-by-step explanation:

triangle needs to be 180 so if xy are the shortest they can be equal so z can be 120

6 0
2 years ago
Read 2 more answers
Does anyone know the answer to these problems if you know the answer for the first question then put 5. and your answer same goe
Anettt [7]
Number 5) A hill that rises 2 feet for every 10 feet of run. Because a longer run is not as steep as a short run.

Number 6) They all are parallel, they do not intersect.
6 0
3 years ago
9 Four students were asked to write an expression that is
BabaBlast [244]

Answer:

Step-by-step explanation:

8x - 20.....factor a 4 out

4(2x - 5) <=== this one is correct...not 100% sure who wrote it

8x - 20...factor out a 2

2(4x - 10) <==== this is correct

8x - 20....factor out a -2

-2(-4x + 10) <==== this is correct

8x - 20....factor out a -4

-4(-2x + 5).....nobody did this one......but somebody tried....that person didn't factor correctly

8 0
3 years ago
Please Please help asap!!! Thank you
natali 33 [55]

Step-by-step explanation:

well, the starting equation and the target format have been given.

let's do the multiplications and compare the target with the starting information.

from there we see what is different or missing.

x² + 14x + 13 = 0

and

(x - p)² = q

x² - 2px + p² = q

x² - 2px + (p² - q) = 0

now let's compare the different parts :

x² = x²

-2px = 14x

-2p = 14

p = -7

p² - q = 13

-7² - q = 13

49 - q = 13

36 - q = 0

q = 36

so, the square (x - p)² = (x + 7)² is completed when

x² + 14x + 49 = 0

but we have only "+ 13". so we need to add 36 to get 49. but we need to do it on both sides, to keep the equation true :

x² + 14x + 13 + 36 = 36

x² + 14x + 49 = 36

(x + 7)² = 36

just as we calculated already above.

and now this can be solved by pulling the square root on both sides (a quadratic equation has always 2 solutions)

x + 7 = ±6

x1 = 6 - 7 = -1

x2 = -6 - 7 = -13

3 0
1 year ago
Other questions:
  • Pleaseee I need help on this one too
    12·1 answer
  • 5/10 is greater, less or equal to 15.50
    12·2 answers
  • An object has a mass of 12kg. On planet A the object weighs 69N. The force of gravity on planet a is:
    6·1 answer
  • Jeans bedroom is 11 feet by 13 feet. She has chosen a carpet which cost $33.35 per square yard. This includes installation. Dete
    7·1 answer
  • Complete the square to transform the quadratic equation into the form
    12·1 answer
  • Is this a parallelogram, rectangle, rhombus, and/or square and how
    13·1 answer
  • Find the measure of the missing angle
    9·2 answers
  • Noah and Diego left the amusement park’s ticket booth at the same time. Each moved at a constant speed toward his favorite ride.
    7·1 answer
  • Lana earns $7.95 per hour . How much does she earn in 8 ?
    11·2 answers
  • (5x - 7) + (10x 7) = 180
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!