-84= -4b -4(-7 -8b)
⇒ -84= -4b -4* (-7) -4*(-8b) (distributive property)
⇒ -84= -4b+ 28+ 32b
⇒ -84 -28= 32b -4b
⇒ -112= 28b
⇒ -112/28= b (inverse operation)
⇒ -4= b
Final answer: b= -4
<span> For this case, the first thing we must do is define a variable.
We have then:
x: unknown number.
First number: 2x - 4
Second number: x
The product of the numbers is:
</span>
<span> Rewriting:
</span>
<span> Deriving the equation we have:
</span>
<span> We equal zero and clear x:
</span>
<span>
Then, the first number is:
</span>
<span>
Answer: First number: -2 Second number: 1 </span>
The minutes taken by Grayson to text 140 words if Grayson can text 70 words in 4 minutes is 8 min.
<h3>What is division?</h3>
It is the basic arithmetic operation, in which you are separating the number into some parts.
Given:
Grayson can text 70 words in 4 minutes,
The time is taken to type one word = 4 / 70 = 0.057 min
Thus, typing 140 words Grayson would take = 0.057 × 140 = 8 min
Therefore, the minutes taken Grayson to text 140 words if Grayson can text 70 words in 4 minutes is 8 min.
To know more about division:
brainly.com/question/27566440
#SPJ1
Well i was taught to add all the sides together so maybe if you added all of it up or only the outsides that's a thought lol
Answer:
Step-by-step explanation:
<h2>
1) </h2>
scale is 1 inch=9 feet
4 inches*9= 36 feet
10 inches*9=90feet
<em><u>it is 36 feet by 90 feet</u></em>
<h2><em><u>
2)</u></em></h2>
scale is 1 inch=5 feet
4 inches*5=20 feet
<em><u>it is 20 feet</u></em>
<h2>
3)</h2>
scale is 1:12
14 inches*12=168
it is 168