Answer:
C. 320 (correct)
Step-by-step explanation:
If Samantha can type 40 words per minute, to find the number of words Samantha can type in 8 minutes, multiply 40 by 8.
40×8=320
Therefore, Samantha can type 320 words in 8 minutes.
I hope this helps!
Answer:
Step-by-step explanation:
y - 3 = (-1/2)(x - 2)
Solve 8x-4y+9=0 for y so as to find the slope of this given line:
8x + 9 = 4y, or y = 2x + 9/4. The slope of the given line is 2. The slope of any line perpendicular to this one is the negative reciprocal of 2, which is -1/2.
Use the point-slope formula: y - k = m(x - h ). (h, k) is (2, 3) and m is -1/2.
Then we have: y - 3 = (-1/2)(x - 2)
Answer: 
<u>Step-by-step explanation:</u>
3(3 + x) = 7x - 9
9 + 3x = 7x - 9 <em>distributed 3 on the left side</em>
<u> -3x</u> <u> -3x </u>
9 = 4x - 9
<u>+9 </u> <u> +9 </u>
18 = 4x
<u>÷4 </u> <u>÷4 </u>
= x
