Step-by-step explanation:
3(7 + x) = 3×7 + 3x = 21 + 3x
remember, when you multiply two expressions, you need to multiply every term of the first expression with every term of the second expression, and then add all partial results (by considering the individual signs, of course).
Actually, the answer is not A, if you're saying A is the first choice above. That's incorrect. You will need to use the Geometric mean for right triangles here to figure out what the value of a is. We will use this form:
![\frac{YZ}{WZ} = \frac{WZ}{XZ}](https://tex.z-dn.net/?f=%20%5Cfrac%7BYZ%7D%7BWZ%7D%20%3D%20%5Cfrac%7BWZ%7D%7BXZ%7D%20)
. We have a value for YZ of 3; side a is XZ. That means in order to solve this we need WZ, which we can find using pythagorean's theorem. 3^2 + 4^2 = c^2 and 9 + 16 = c^2 and c = 5. Now we fill in accordingly:
![\frac{3}{5}= \frac{5}{XZ}](https://tex.z-dn.net/?f=%20%5Cfrac%7B3%7D%7B5%7D%3D%20%5Cfrac%7B5%7D%7BXZ%7D%20%20)
. Cross-multiply to get 3XZ=25 and side XZ is
![\frac{25}{3}](https://tex.z-dn.net/?f=%20%5Cfrac%7B25%7D%7B3%7D%20)
. XZ is 25/3 and YZ is 3, so 25/3 - 3 = XY. That means that XY (side a) = 16/3 or 5 1/3, choice B, or the second one down.
Answer:
Owen can type 536 2/3 per minute
Step-by-step explanation:
let me know if this is wrong
Using the slope:1/3 and y intercept:2
Answer:
4+62=66
Step-by-step explanation: