30b + 100u = 900
5b + 25u = 200....multiply by -6
------------------
30b + 100u = 900
-30b - 150u = - 1200 (result of multiplying by -6)
------------------add
-50u = - 300
u = 6 <== upgrated phones sold
30b + 100u = 900
30b + 100(6) = 900
30b + 600 = 900
30b = 900 - 600
30b = 300
b = 10 <== basic phones sold
Answer:
A. baseball field
Step-by-step explanation:
Y = mx + b, where m is the slope, and b is the y-intercept. If we were to consider a line of best fit that would represent all these points with a linear line, it'd cross the y-axis with a y-value of 10, so we can fill in y = mx + b to y = mx + 10. Now, it runs down from left to right, so we know the slope must be negative. The only equation that fits this description is y= -3/4x + 10
Answer:
-5≤x≤0
Explanation:
You need to use a symbol that shows that x can be both equal to and greater than -5 and also a sign that displays x as less than and equal to 0.
Answer:
7
Step-by-step explanation:
f(x) = x+2
The input is x=5
The output would be
f(x) = 5+2 = 7
