7+(-15)+12
Adding a negative number is the same as simply subtracting it.
7-15+12
7 - 15 = negative 8 (use a number line)
-8 + 12 = 4 (use a number line)
Answer:
Only A
Step-by-step explanation:
For A, the y coordinate does represent the total cost of electricity for 4 hours. If you see the corresponding numbers on the chart, they both work. As for B, I used a proportional relationship with A to calculate if B works. Work: $120/4 hours. Divide both sides by 4 and u get $30 per hour, which means B is incorrect. C is incorrect because the answer is A.
Answer:
about 6
Step-by-step explanation:
a^2 + b^2 = c^2
5^2 + 4^2 = c^2
25 + 16 = 41
sqrt of 41 = about 6.403
round that down to 6.
Answer:
slope = -
Step-by-step explanation:
the equation of a line in slope- intercept form is
y = mx + c ( m is the slope and c the y- intercept )
y = 2x + 7 is in this form with slope m = 2
This line is perpendicular to the side it bisects.
Given a line with slope m then the slope of a line perpendicular to it is
= - = -