Add the coefficients of like terms.
a) (6x³ +8x² -2x +4) + (10x³ +x² +11x +9)
= (6+10)x³ + (8+1)x² + (-2+11)x + (4+9)
= 16x³ +9x² +9x +13
b) (16x³ +9x² +9x +13) + (3x -2)
= 16x³ +9x² + (9+3)x + (13-2)
= 16x³ +9x² +12x +11
Distribute.
8(y+4)
8y+32= 7y+38
Subtract 32.
8y= 7y+6
Subtract 7y from both sides.
1y= 6
Divide 1 into both sides.
y=6
I hope this helped!
Keep note of these things before we start:
-Of is a keyword that tells us multiplication is being done
-x = total number of pages
-32% = 32/100 = .32
Okay, here we go:
32% of total number of pages = 80
.32 of x = 80
.32*x = 80
.32x = 80
.32x/.32 = 80/.32
x = 250
There are 250 pages in total in Katie's book.
To find out how many pages she has to read (y), subtract the pages read from the total:
TOTAL - PAGES READ = PAGES LEFT TO READ
250 - 80 = y
170 = y
Katie has 170 pages left to read
Hope this helps!
No. Both legs can be 10, but the hypotenuse has to equal
Simple,
x+7= 18-2x
you want isolate the variable, x, to find what it's value is...
x+7=18-2x
+2x +2x
Making it..
3x+7=18
still not done...finish isolating the variable...
3x+7=18
-7 -7
3x=11

=

Thus, your answer is, x=

.