Answer:
35
Step-by-step explanation:
Here we see 5 black keys for every 7 white keys.
So the ratio is 5:7
If we need 49 white keys, find the amount we scale the original ratio by:
49/7 = 7
So we are scaling by a factor of 7.
The number of black keys would be 5 * the scale of 7. = 35
So there should be 35 black keys.
Answer:
Step-by-step explanation:
His original gross monthly salary was $1083.34. This means that the total amount that he earned that he earned in the first 6 months would be
6 × 1083.34 = $6500.4
After working satisfactorily for 6 months, Dave received a 7% raise. The amount by which it was raised would be
7/100 × 6500.4 = $455.00
His salary for the next 6 months would be
6500.4 + 455.00 = $6955.40
Dave's gross annual salary would be
6955.40 + 6500.4
= $13455.8
The school can buy fifteen notebooks and nineteen tablets. 15X7=105 and 5X19=95. 95+105=200. The first thing you want to do is realize that 5Xanything will give you an answer that has a 0 or a five at the end, so you want to find a product by 7 that ends with a 0 or 5 too.
Answer:
Not necessarily, because this wasn't an experiment.
Step-by-step explanation:
Using a graphing tool
Let's graph each of the cases to determine the solution of the problem
<u>case A)</u> 
see the attached figure N 
The range is the interval--------> (0,∞)
therefore
the function is not the solution
<u>case B)</u> 
see the attached figure N 
The range is the interval--------> (0,∞)
therefore
the function is not the solution
<u>case C)</u> 
see the attached figure N 
The range is the interval--------> (-∞,3)
therefore
the function is the solution
<u>case D)</u> 
see the attached figure N 
The range is the interval--------> (-3,∞)
therefore
the function is not the solution
<u>the answer is</u>
