Aiko is finding the sum (4 + 5i) + (–3 + 7i). She rewrites the sum as (–3 + 7)i + (4 + 5)i. Which statement explains the mathematical property that she made an error using?
Solution 1
Answer:
Given the expression:
Aiko rewrites the equation by factoring out the from the expression and this wrote it as,
but this is wrong because is an imaginary number which is with a number 5 and 7.
Therefore, Aiko cannot factor out the because it is not present in both numbers -3 and 4
She could rewrote it as
So, she incorrectly used the distributive property by combining the real number and the coefficient of the imaginary part.
Solution 2
Aiko didn't seem to realize that rewriting it like that would cause the expression to have a different solution. She should study her math.
📚 Related Questions
2a/b = w
divide both sides by 2 to get
a/b = w/2
now multiply both sides by b to get
a = bw/2
$25.10 = 1.08n divide both sides by 1.08 = $23.24
To find the original price we must say that the sale price is 80% of the original price.
So we can write $23.24 = 80% of n or $23.24 = .8n Dividing both side by .8 we get $29.05.
So how can we do both of these in one equation? Here is one way.
($25.10/ 1.08) = .8n (I wrote it as two equation above since it explains it better)
There are other equations that will work too.
The length of the original drawing will be 39 feet.
Given scale:
1 inch = 3 feet
Length of the drawing = 13 inches
What is a scale factor?
A scale factor is a factor by which the dimensions of an object are enlarged.
1 inch = 3 feet
So, 13 inches =13*3 feet
13 inches =39 feet
So, the length of the original drawing =39 feet.
Hence, the length of the original drawing will be 39 feet.
To get more about scale factors visit:
1:3.
13:?
So we multiply 13 by 3 to get the answer!
13:39
or 39 feet!
I hope this helped! :))
Answer:
419
Step-by-step explanation:
Regrouping in subtraction: If we borrow from one group (tens group) and give to another (Once group) so that the operation can be completed, then this process is called regroup.
For example: We need to find the value of 52-39
We can not subtract 9 from 2. So we will borrow 10 from 50 and give to 2.
Now,
We need to find the greatest 3 digit number that can subtract from 426 so that we need to regroup.
To use regroup, the once digit must be more that 6. So, maximum value for once place is 9.
Therefore, the greatest 3 digit number that can subtract from 426 by using regroup is 419.
9/6s = 21
1.5s = 21
s = 14