Answer:
56
Step-by-step explanation:
x/8= 7
Cross multiply
x= 7×8
x= 56
Hence the value of x is 56
Means, for every 1 input, there is 1 coresponding output
normally x is input and y is output in form (x,y)
so just look for the option(s) that has/have every first number repeat with only 1 2nd number
A. -7 repeats with 5 and -3, not a function
B. no repeats of first number (6,-8) and (-5,-8) are fine because first numbers don't repeat, das is funciton
C. no repeats, function
D. no repeats, function
answer is B,C,D
Step-by-step explanation:
180(n-2)/n =157.5
180n -360/n=157.5
Cross multiplying
180n -360=157.5n
180n-157.5n=360
22.5n=360
22.5n/22.5=360/22.5
n=16, the number of sides the polygon has is 16
John spent 2.4 hours working on the project.
Step-by-step explanation:
Let,
Number of hours worked by Dawn = x
Number of hours worked by Keith = y
Number of hours worked by John = z
According to given statement;
Dawn spent 1.2 hours less than 6 times as many hours on the project as John did.
x = 6z-1.2 Eqn 1
y = 5z+1.2 Eqn 2
As Dawn and Keith worked same amount, therefore,
Eqn 1 = Eqn 2
John spent 2.4 hours working on the project.
Keywords: linear equations, addition
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