Answer:
Zelie should have divided both numbers by 14 to find the scale (2)
Step-by-step explanation:
9 is subtracted from the sum of 5 and a number
Multiply the values of a and c together;
9*30= 270 <— find prime factors of this
270= 3*3*3*5*2
Now find a way to add these factors in different ways to give 33 (b value)
We can try (3*3*2)+(3*5)=?
18+15=33
Now that you know the numbers, break down the b value.
9x^2+18x+15x+30
9x(x+2)+15(x+2) <— make sure the brackets are the same
(9x+15)(x+2) <— check if this expands to the initial answer
Hope I helped :)
Answer: True
Explanation:
Consider a 3D cardboard box that you can unfold. It would unfold into a 2D net that you can then re-fold back into its 3D form. The 2D net is useful to help visualize and calculate the surface area. The surface area is simply the total area of all the external faces.
Answer:
x=-3 10/16
Step-by-step explanation:
5x-9-21x-42=25 (opening parenthesis)
-16x-33=25
16x+58=0
x=-58/16=-3 10/16