Answer:
C or d
Step-by-step explanation:
Answer:

Step-by-step explanation:
We have:

To solve, we will isolate the x variable. Therefore, subtract 7 from both sides:

Divide both sides by 2:

Take the square root of both sides. Since we’re taking an event root, we will need plus/minus. Therefore:

Therefore, our solutions are:

Answer:
D.
Step-by-step explanation:

Answer: (C) 16
Step-by-step explanation:
Given : Number of sizes of self-stick notepads= 2
Number of colors = 4
Type 1 : The store packs the notepads in packages that contain 3 notepads of the same size.
i.e. By Fundamental principle of counting , we have
Number of different packages possible = Number of colors x No. of sizes
= 
Type 2: Notepads of the same size and of 3 different colors.
Choices for 3 different colors out of 4 : 
Again by fundamental principle :
Number of different packages possible = No. of choices for choosing 3 different colors x No. of sizes
= 
From Type 1 and Type 2 , the total number of different packages of the types described above are possible =8+8= 16
Hence, the correct answer is option (c) 16.
Answer:
70 m × 10 m
Step-by-step explanation:
At a geological site, Judith is digging for sandstone. To mark off a rectangular area, Judith has 160 meters of rope and 4 stakes.
We have to choose from the given dimensions of rectangles where Judith can use all the rope she has to cover the rectangular area.
It is clear from the given conditions that the perimeter of the rectangular area should be exactly 160 meters.
So, the required dimensions of the rectangle are 70 m × 10 m, because the perimeter of this rectangle is exactly 160 meters. (Answer)