The science books can be placed before or after the English books, so that’s two ways science-English or English-science.
There are 24 ways to arrange the 4 science books and 2 ways to arrange the English books.
So we have 24×2+2×24=96.
Answer:
A
Step-by-step explanation:
The points are similar
I think this is a fool question.....I don't know
We have to determine the number of blocks. We know that that number have 9 in the ones place. It also has the number in the hudreds place ( x ) which is 1 more than the number in the tens place ( y ). And: x + y = 11. Another equation is: x = y + 1. Therefore y + 1 + y = 11; 2 y = 11 - 1; 2 y = 10; y = 10 : 2; y = 5 and x = 5 + 1 = 6. Answer: There are 659 blocks<span>.</span>
Answer:
Step-by-step explanation:
hello :
x²-3x-10=0 means : (x-5)(x+2)=0
x-5=0 or x+2=0
conclusion two solutions : 5 and -2