Answer: 648 crayons
Step-by-step explanation:
Given : Each student in ms sikes's kindergarten class has a box of crayons. Each box has 36 crayons.
If there are 18 students in Ms sikes class, then by using Multiplication operation the total number of crayons there are =
i.e. the total number of crayons there are =648
Hence, there are 648 crayons in all.
Step-by-step explanation:
Giventhat , A pharmacist 13% alcohol solution another 18% alcohol solution .
Let he took x gram solution of type solution
and he took (50-x) gram of type solution.
Total amount of alcohol = gram
Total amount of solution = 50 gram
According to problem
⇔
⇔
⇔- 5x= 700 - 900
⇔5x = 200
⇔x = 40 gram
Therefore he took 40 gram of type solution and (50 -40)gram = 10 gram of
type solution.
Answer:
40 of first and 10 of second
Step-by-step explanation:
Factor the minus or negative off the -x²+8x and don't do anything with -12
Find the number that can complete the square, for x²-8x, it'd be +16.
Just think of debt, you borrow, you have to give back. You borrow +16 then you have to give 16 out so you write -16 out of x²-8x+16 but still inside the bracket.
Distribute the minus/negative inside the bracket as you get -(x-4)²+16-12 because negative multiply negative and you get positive
Then you get y=-(x-4)^2+4
Because a<0, it's inverted parabola as shown below.
therefore, the vertex is at (4,4) or (-(-4), 4) because the vertex is at (-h,k) and h is -4 that means -h = 4
axis of symmetry is -b/2a, our b is 8, -b = -8 and 2a = 2(-1) so -8/-2 = 4 (From the standard form)
therefore, axis of symmetry is 4