Answer:
From the question, it is given that the number 5 is subtracted from three times a number, then the result is 16.
Let us assume the number be x, so now we have to frame the equation according to the question
Therefore, the equation is given by
⇒3x−5=16
Now taking the constant term to the right side, so we get
⇒3x=16+5
Now solving the addition part of the right side equation, we get
⇒3x=21
So taking the constant term to the right side in the denominator, we get
⇒x=213
On solving the division, we get
⇒x=7
Therefore, 7 is the number.
hope it will help you
Answer:
6
Step-by-step explanation:
Since the relationship is proportional, when y is increased by a factor of 3 from 7 to 21, so is x—from 2 to 2×3 = 6.
Ok,
8x - amount of boys
7x - amount of girls
8x + 7x = 195
15x = 195
195 / 15 = 13
x = 13
Plug in 13 for x
8 * 13 = 104
7 * 13 = 91
There are 104 boys and 91 girls
Hope this helps!
We want to know when we brought it back in to the room. at that time
the temperature difference is 80 - 42 = 38 so we have to solve
<span>
38=9<span>e<span>^−.3344t</span></span></span> for t
this time we get
<span><span>38 / 9</span>=<span>e^<span>−.3344t</span></span></span>
<span>t=<span><span>ln(<span>38 / 9</span>)</span><span> / −.3344</span></span></span>
<span>t=−4.3</span>
so 4.3 minutes before 2:10