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Rufina [12.5K]
3 years ago
8

To solve the equation x + 7 = 13,

Mathematics
1 answer:
barxatty [35]3 years ago
4 0

Answer:

C

Step-by-step explanation:

x + 7 = 13

x - 7 = - 7

x = 6

This is because you want to get the x by itself on one side to solve the equation.

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a culture started with 6000 bacteria after 6 hours it grew to 7200 bacteria predict how many bacteria will be present after 17 h
Zigmanuir [339]
First find the rate of growth using the formula of
A=p e^rt
A 7200
P 6000
E constant
R rate of growth?
T time 6 hours
We need to solve for r
R=[log (A/p)÷log (e)]÷t
R=(log(7,200÷6,000)÷log(e))÷6
R=0.03 rate of growth

Now predict how many bacteria will be present after 17 hours using the same formula
A=p e^rt
A ?
P 6000
R 0.03
E constant
T 17 hours
A=6,000×e^(0.03×17)
A=9,991.7 round your answer to get
A=9992
8 0
3 years ago
Read 2 more answers
What is 7 over 8 plus 3 over 4 minus 1 over 3
Otrada [13]

Answer:

1  7/24.

Step-by-step explanation:

7/8 + 3/4 - 1/3       The LCD of 3,4 and 8 is  24 so we have:

21/24 + 18/24 - 8/24

=  39/24 - 8/24

= 31/24

= 1 7/24.

5 0
3 years ago
How am I supposed to answer this question if it doesn't tell me how many gallons the energy-saving showerhead uses compared to t
Gre4nikov [31]

Answer:

A, or 16 gallons

Step-by-step explanation:

First, you have to analyze what the function means. It tells you that x is the number of minutes in the shower, so now we have y=3(minutes in shower). Logically, 3 has to be gallons per minute so that the equation makes sense, since you're multiplying 3 by minutes in the shower. It also uses the same phrasing in the beginning of the problem when it says "A standard shower head in Jen's house dispenses 5 gallons of water per minute." Now, it's 3 gallons of water per minute (x). That means y has to be overall gallons. So, now the equations is overall gallons=3 gallons per minute. If she uses the shower for 8 minutes we can plug in for x. So now the equation is overall gallons=3 gallons times 8 minutes, or overall gallons=24 gallons. With the new shower head, 24 gallons is used. Now to find for the old shower head. 5 gallons per minute times 8 minutes = 40 gallons. Now we subtract to find out how many gallons Jen saves each day. 40-24=16. She saves 16 gallons.

6 0
2 years ago
Could someone please help me with this problem and give me an explanation on how to solve it?
elena-s [515]

Answer:

B

Step-by-step explanation:

(a^3/2) / a

= a^(1/2)

= √a

= B

3 0
2 years ago
Read 2 more answers
Evaluate -(7-3)(75).
SIZIF [17.4K]

Answer:

-300

Step-by-step explanation:

<em><u>The first step is to distribute the -1 to (7  - 3), like so:</u></em>

-(7 - 3) (75)

-7 + 3(75)

<em><u>Add like terms (-7 and 3):</u></em>

-4(75)

-300

8 0
3 years ago
Read 2 more answers
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