Answer:
Step-by-step explanation:
THE DETERMINANT IS:
c=ad-bc, where we have the matrix a b
c d
C=16-(-20)=16+20=36
c for 28 c=(-1/2 *8)-(-4)=-4+4=8
Answer: 2 + 2 x 10 = 22
10 x 100 (?) = 1,000
1,000 x 10,000 (?) = 10,000,000
Step-by-step explanation:
For A, (2 + 2 x 10), you need to multiply first, 2 x 10 = 20. Then, you must add 2, which equals 22.
For B, which is (10 x 100, I think) you will multiply the top number by the bottom number, let’s say 100 is on the top. You will line thin up, 100 x 10. You will need to multiply 0 times 100, which is 000. You will then need to move over a slot, and then times 100 by 1. After doing that then you add your numbers, which gives you 1,000.
For C you do the same steps you used for B.
Solve your system of equations step by step.
x−2y=14;x+3y=9
Solve x−2y=14 for x:
x−2y+2y=14+2y (Add 2y to both sides)
x=2y+14
Substitute (2y+14) for x in x+3y=9:
x+3y=9
2y+14+3y=9
5y+14=9(Simplify both sides of the equation)
5y+14+−14=9+−14 (Add -14 to both sides)
5y=−5
5y5=−55 (Divide both sides by 5)
y=−1
Substitute (−1) for y in x=2y+14:
x=2y+14
x=(2)(−1)+14
x=12(Simplify both sides of the equation)
So,
y=-1
x=12
Answer is C)
If I’m correct it should be 6+4i good luck
5 and 6 are true but 7 is not true. If you divide an odd number by 2 it's not going to be half of it
