Answer:
All real numbers are solutions.
Step-by-step explanation:
Let's solve your equation step-by-step.
−28+4x=4(x−7)
Step 1: Simplify both sides of the equation.
−28+4x=4(x−7)
−28+4x=(4)(x)+(4)(−7)(Distribute)
−28+4x=4x+−28
4x−28=4x−28
Step 2: Subtract 4x from both sides.
4x−28−4x=4x−28−4x
−28=−28
Step 3: Add 28 to both sides.
−28+28=−28+28
0=0
Answer:
All real numbers are solutions.
<3
#1 is B. #2 is C. #3 is A
Answer:
<h2>
After 5 hours</h2>
Step-by-step explanation:
If a scientist counts 35 bacteria present in a culture and finds that the number of bacteria triples each hour and the function y = 35 ∙ 3x models the number of bacteria after x hours, in order to estimate when there will be about 550 bacteria in the culture we will substitute y = 550 into the modeled equation and calculate the value of x as shown;
If y = 35*3x
when y = 550
550 = 35*3x
Dividing both sides by 35;
550/35 = 35*3x/35
3x = 550/35
x = 550/3*35
x = 550/105
x = 5.24
This means that there will be 550 bacteria in the culture after approximately 5 hours
The answer is between A or b
