Hello,
let's assume j the john's age, m the mary's age.
<span>"John is twice as old as mary"==>j=2*m
</span>
<span>"the sum of their ages is 21" ==>j+m=21
==>2*m+m=21
==>3m=21
==>m=7
and j=21-7=14
</span>
Answer:
<em>y = 5x + 100</em>
Step-by-step explanation:
Using the x and corresponding y values from the given table.
Let's use the coordinate (0, 100) and (1, 105)
The equation in slope intercept form is expressed as y = mx+c
m is the slope
c is the y-intercept
Slope m = y2-y1/x2-x1
m = 105-100/1-0
m = 5/1
m =5
Get the y intercept
Substitute the slope m = 5 and any point say (0, 100) into the equation
y = mx+c
100 = 5(0) + c
100 = c
c = 100
Get the required equation;
y = mx+c
y = 5x + 100
<em>Hence the equation in slope-intercept form that represents the data is expressed as y = 5x + 100</em>
Answer:
4.7
Step-by-step explanation:
Area: 20 x 30 so 600
perimeter: 20 + 20 + 30 + 30 = 100
Answer:
B, C, D, E, and F
Explanation:
They are all going the same way and have four 90* angles.
