The answers are -4 and 3 :)
<h3>step 1.</h3>
use graph paper.
<h3>step 2.</h3>
draw lines thru the graph wait go on my image above!
Answer:
Mikayla moved the decimal incorrectly.
Step-by-step explanation:
mikayla evaluated the expression 0.86 × 23.4 using the steps shown below.
0.86
× 23.4
344
2580
+ 17200
= 201.24
LEts do the multiplication without decimals
8 6
x 2 3 4
--------------------
3 4 4
2 5 8 0
1 7 2 0 0
------------------------------
2 0 1 2 4
0.86 has two numbers after the decimal point and 23.4 has one number after the decimal point
So we move 3 places to the left ( 20.124)
Mikayla moved the decimal incorrectly.
If y=8-x then you can plug that into the equation like 7=2-(8-x). When you distribute the equation becomes 7=2-8+x. Once you combine like terms the equation becomes 7=-6+x. Then you subtract 6 from both sides, which gives you 13=x.
To find y just put 13 where x was in the first equation. Y=8-13.
Y=-5
X=13
Let the age of devaughn be x and Sydney be y.
Then,x+y=45
x+5=y
y=x+5
here,
put y=x+y in x+y=45
then,
x+y=45
x+x+5=45
2x=40
x=20
now,
y=x+5
y=20+5
y=25
