Answer:
(x + 3)(2x + 5)
Step-by-step explanation:
Given
2x² + 6x + 5x + 15 ← grouping the terms
= (2x² + 6x) + (5x + 15) ← factor each group
= 2x(x + 3) + 5(x + 3) ← factor out (x + 3) from each term
= (x + 3)(2x + 5) ← in factored form
Step-by-step explanation:
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If you draw the 5 posts (dots) on a piece of paper and connect the dots, you will need 10 lines to connect them all to each other, so she will need 10 streamers.
3x+2y=11--------x1
7x-y=3------------x2
3x+2y=11---equ 1
14x-2y=6---equ 2
equ 1+ equ 2 will eliminate y
17x=17
x=1
then put x=1 in equ 1
3(1)+2y=11
2y=11-3
2y=8
y=8/2
y=4
