Let's try plugging in some negative numbers. Let's do x=-1. 5+-1=4. So we know that if we put in a negative number for x, then n will be positive. But what if we do a number greater than -5, because 5+-5=0. So let's try x=-6. So 5+(-6)=-1. Hmm. So here it is. We know that any number under -5 will be positive and any number above -5 will be negative.
2a + b = 15.7
length a is longer than b.
a = 6.3
2a + b = 15.7
(2*6.3) + b = 15.7
12.6 + b = 15.7
b = 15.7 - 12.6
b = 3.1
therefore the base length is 3.1 cm
Answer:
2nd option
Step-by-step explanation:
f(x) + g(x)
= 4x - 5 + 3x + 7 ← collect like terms
= 7x + 2
domain is all real numbers
