Answer:
A 3/4
Step-by-step explanation:
Set up equation to find the percentage 2/7 equals:
Variable x = percentage
2/7 = x/100
Cross multiply:
2 × 100 = 7 × x
200 = 7x
Divide:
28.57142... = x
About 30% (I rounded to 30% because it is a nice number to use when all other numbers end in 5 or 0)
If Alexa has about 30% saved, she will need to save about 70% more. Find the solution that is closest to 70%.
A is 3/4 which comes out to 75%. So far, this sounds like the best answer. Let's check the others just in case.
B is 1/2, or 50% which isn't as close as A was to 70%.
C is 1 1/4 which means 125% needs to be saved. This would mean Alexa is in debt and hasn't saved any money which is not the case.
D is 1/4, or 25%. The trick here is that she's saved about 30% so 25% is closest, but we are looking for how much <em>more</em><em> </em>she needs to save.
Answer:
cm.
Step-by-step explanation:
We have been given that the average human body cell is about cm in diameter. The diameter of a plant cell is cm.
To find the combined diameter of the body cell and plant cell, we will add both diameters.
First of all let us convert our given diameters in standard notation.
Let us convert our answer in scientific notation.
Therefore, the combined diameter of the body cell and plant cell is cm.
For this case we have the following expression:
(x-5) 1/2 + 5 = 2
Rewriting correctly we have:
(x-5) ^ (1/2) + 5 = 2
Clearing x we have:
(x-5) ^ (1/2) = 2-5
(x-5) ^ (1/2) = -3
(x-5) = root (-3)
x = 5 + i * root (3)
Answer:
The value of x is given by:
x = 5 + i * root (3)
Answer:
4 1/2 hours
Step-by-step explanation:
Pragnesh = 30 minutes
Qazi = 1 1/2 hours
Ronghui = 2 1/2 hours
add them and that gets you 4 1/2 hours. You can also check this yourself by putting this in the number problem. :)
4 - 8x = -1 + 1 - 9x + 8
Combine like terms.
4 - 8x = -9x + 8
Add 9x to both sides.
4 + x = 8
Subtract 4 from both sides.
x = 4
The x-intercept is equal to 4.