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bogdanovich [222]
3 years ago
15

I need help with number 11

Mathematics
1 answer:
FinnZ [79.3K]3 years ago
6 0

Answer:

-b/2a is the equation to find the x coordinate of the vertex point and it's y, when x is plugged into the quadratic equation.

Step-by-step explanation:

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There are 57 guests and he want everyone to have a slice. I want to pay as little as possible and for them to be the same size.
dexar [7]
3 cakes of 25cm will be enough for all and it will cost him least possible amount of 3 x 18.75 = 56.25
as
<span>1 cake of 25cm serves 20 people
</span>3 cakes of 25cm will serve 3 x 20 = 60 people

3 cakes will be more than enough for 57 guests and himself as well, so it will be served in overall 58 persons and it will cost him:
56.25 / 58 = 0.97 per guest.
Which will be the least cost for him.
5 0
3 years ago
What is 4C (matrix) ?
Cerrena [4.2K]
The 4C matrix is obtained when all elements of matrix C are multiplied by 4. It <span>has all the same elements as C, only multiplied by 4.
Let's analyze all matrices
A. Not all elements of A can be divided by 4 (3 can not be divided by 4, the solution is not a whole number).
B. All elements of matrix B can be divided by 4, which means that B is a $C matrix (there is a matrix C which multiplied by 4 gives the matrix B).
C. Not all elements of C can be divided by 4.
D. Not all elements of D can be divided by 4.

Solution: B
</span>
4 0
4 years ago
How to solve for j -10=║j-7║
Aleksandr [31]

Answer:

No solutions.

Step-by-step explanation:

-10 = 7

No solutions

6 0
3 years ago
When is a parallelogram is a rhombus ?
Ierofanga [76]

A parallelogram is a rhombus when one of the following conditions is done:
1. All sides of the parallelogram are equal to each other.
2. The diagonals of the parallelogram intersect at a right angle (90°).
3. The diagonals of the parallelogram are the bisectors of its angles.
 
I hope this helps.
3 0
4 years ago
Read 2 more answers
Richard's cumulative GPA for 3 semesters_ was 2.0 for 42 credits. His fourth semester GPA was 4.0 for 14 course units. What is R
Phoenix [80]

Answer:

Richard's cumulative GPA = 2.5

Step-by-step explanation:

Richard's cumulative GPA for 3 semesters was 2.0 for 42 credits.

Average = 2

Total credits = 42

Average = sum of terms/total no of terms

2 = sum of terms/42

sum of terms = 84 ....(1)

His fourth semester GPA was 4.0 for 14 course units

Average = 4

Total credits = 14

sum of terms = 56 .....(2)

Average for 4 semesters,

A=\dfrac{84+56}{42+14}\\\\A=2.5

Hence, Richard's cumulative GPA for all 4 semesters is 2.5.

8 0
3 years ago
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