Answer:
a) 2y
b) 69
Step-by-step explanation:
the answer is {a} because Mr Robertson already had the unit rate which is 72 and Ms Malloy had the unit rate for 2 miles so to find the unit rate for 1 miles you have to divide 126 by 2 which gives you 63 miles per an hour so Mr.Robertson drove the faster
Try to rewrite the equation;
You know that 5 can be written as log3(3^5)
log3(3^5)=log3(x^2+18) <-- you can now cancel out log3
3^5=x^2+18
243-18=x^2
225=x^2
√225=x
+-15=x
You see that even if x is negative, the squared will always give a positive answer. Therefore, +15 and -15 are both possible answers.
Hope I helped :)
Answer:
$583.70
Step-by-step explanation:
x/449 30/100= 449x30=13,470
13,470 divided by 100=134.70
449+134.70=583.70