Answer:
1. 21/25
2. 72
3. -4
4. Typo?
2I+2w= 33
21+2w=34
5. Dont understand this question withought context
Step-by-step explanation:
1. 84/4 and 100/4 is 21/25
2. 3(6)(-4) miltiplication
3. worry about parenthesis first, a positive plus a negatative goes to minus so 6-4 then multiply 2 times -2 and get -4
4.
2I+2w is 2(10)+2(6.5)
21+2w is 21+2(6.5)
L=3+w
w=w
p=2(3+w)+2w
p=6+2w+2w
p=6+4w
34=6+4w
28=4w
w=7
l=10
4.
b^-2-x^-2/b^-1+x^-1
b^-2/b^-1=b^-1
x^-2/x^-1=x^-1
As a result, the simplest form is:
b^-1-x^-1. Hope it help!
<h3>
Answer: Choice B</h3>
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Explanation:
If you graphed the equation 2x-5y = 14, you'll find it has a positive slope. It turns out the slope in this equation is 2/5, which is positive. A positive slope means the line goes uphill as you move from left to right. This means we can rule out choice because of this (since we want the line to slope downward).
Now let's turn to choice D. If we multiply both sides of the first inequality by -1, then we go from 
to 
. Note the inequality sign flips. This always happens when we multiply both sides by any negative number. The inequality implies that the shaded region will be above the boundary line, but this contradicts the drawing which shows the shaded region is below the diagonal boundary line. We can rule out choice D because of this. Choice A can be ruled out for similar reasoning.
You should find that only choice B is left. The diagonal line is 2x+5y = 14, and we shade below this boundary line, as well as shading to the right of the y axis (to indicate all values have positive x coordinates). Values on the boundary count as solution points as well.
no. mike added the two fractions incorrectly by not changing them to common denominators.
the correct answer:
4/7 + 1/4 = ?
4/7 = 16/28 (multiply both the numerator and denominator by 4 to get the common denominator fraction)
1/4 = 7/28 (multiply both the numerator and denominator by 7 to get the common denominator fraction)
16/28 + 7/28 = 23/28 (only add the numerators!!)
mike covered <u>23/28 </u>of the distance from his home to the library. (always check to see if your answer can be simplified)
