Answer:
n/4 - 3 OR 1/4n - 3
Step-by-step explanation:
First, let's assign a variable to Emily's number. Let is be <em>x</em>.
Now all we have to do is go through the problem step by step.
"She finds 1/4 of the number..."
There are two ways you can do this. You can either multiply n by 1/4 (1/4n), or you can divide by 4 (dividing by four is the same as finding 1/4 of a number). For this example let's divide by four
n/4
"...and then subtracts 3."
All we have to do is subtract 3 from n/4
n/4 - 3
REMEMBER: like I said, there are two possible options. You can either have n/4 or 1/4n. They mean the same thing
Suppose u = (1,2,3), v = (2, -3, -4), and w = (1,0,-2). (a) Find u-2v + 3w. (b) Write the vector (3,4,5) as a linear combination
marishachu [46]
<h2>
Answer with explanation:</h2>
We are given vectors u,v and w as follows:
(a)
Now we are asked to find the value of:
The value is calculated as follows:
Hence,
(b)
We are asked to represent (3,4,5) as a linear combination of u, v, and w.
Let:
i.e.
on multiplying equation(1) by 2 an then adding equation (1) to equation (3)
on putting the value of a in equation (2) we get:
Now on putting the value of a and b in equation (1)
Hence, we have:
In order to find the number, we will need to set it up in an equation. In total, there are 460 students while 60% of them have pets. Lets set that up.
460(60%)
In order to correctly do this, we will need to transfer 60% into a decimal, which is .6. Now we will rewrite it.
460(.6)
This now can be represented by the number 276.Since we know that 276 is 60% of 460, The total number of students that have pets will be 276.
Answer:
C)
Step-by-step explanation:
16x - 7 = 11x - 32
16x - 11x = -32 + 7
5x = -25
x = -5
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-4x - 10 = 2x + 20
-4x - 2x = 20 + 10
-6x = 30
x = -5
Answer:
1.15
Step-by-step explanation:
20.7 divided by 18 equals 1.15
