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2 years ago

How can You use mental math for 878 + 534=

2 answers:

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]2 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.

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Write and equation for (-1,2) and (0,0)

Natali5045456 [20]

Since the slope is -2 because
x1: -1 x2: 0
y1: 2 y2: 0
y2-y1/x2-x1 = slope (0-2/0+1= -2/1 = -2)

You would havr to change it into point slope form so it would look like this
Y-2 = -2(x+1)
y-2 = -2x -2
+2 +2
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Hope this helps:)

8 0

3 years ago

Answers+steps please?

koban [17]

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2 years ago

Solve for u<br> 5+4u=11<br> Simplify your answer as much as possible

r-ruslan [8.4K]

Answer:

u = 1.5

Step-by-step explanation:

5+4u=11

-5 -5

4u = 6

/4 /4

u=1.5

5 0

2 years ago

Which of the following equations describes the graph?

san4es73 [151]

Answer:

Option D y=-3x^2 +4

Step-by-step explanation:

This is the correct answer because the graph is going down which shows that it is negative and the y intersect is +4

7 0

3 years ago

Read 2 more answers

PLEASE PLEASE HELP

noname [10]

Answer:

$8.51x10^{-3}cm$

Step-by-step explanation:

In order to add or subtract numbers in scientific notation, the powers of ten must have the same exponent. In this caes the diameter of an average human body cell is a power of -4 and the diameter of a plant cell is a power of -3. In order to add them, we can move the decimal over for the body cell diameter:

$5.1x10^{-4}=0.51x10^{-3}$

Add the two values: $0.51x10^{-3}+8x10^{-3}=8.51x10^{-3}cm$

7 0

2 years ago

Read 2 more answers