Answer:
-3/4
Explanation:
-21 and 28 are both multiples of 7. Divide the numerator and denominator by 7 to simplify it.
-21/28
= -3/4
I hope this helps!
Step-by-step explanation:
Let the number of books of Physics be x . Then , No. of chemistry books =3.5x
Now , according to question :
x+3.5x=90
Or , 4.5x=90
Or , x=90/4.5
Or , x=20
Now ,
3.5x= 3.5×20
= 70
Therefore , there were 70 chemistry books and 20 physics books in that question bank.
Answer:
3 terms
Step-by-step explanation:
In this problem, we are given an expression of a quadratic function of a single variable x as x² - 3x + 7.
Now, we have to find the number of terms included in the above-given expression.
The expression includes two x terms and one constant term.
Therefore, the whole expression has total ( 2 + 1 ) = 3 terms. (Answer)
Let the Integer be x then its consecutive number will be x+1,
So, x+x+1=139,
2*x=138
x=69
The integers are 69,70
OK the next step is to multiply 3r -1 by -7r
this gives us -21r^2 + 7r and we write it below -21r^2 + 25r
and subtract
This gives us 18r and we bring down the -6 to give
18r - 6
Finally we divide 18r by -3r to give -6 then add - 6 to the r^2 - 7r on the top
then multiply -3r - 1 by -6 to give 18r - 6
subtraction then leaves nothing.
so the answer is r^2 - 7r - 6
