WHOEVER ANSWERS FIRST GETS BRAINLIEST!! PLZ EXPLAIN CLEARLY
1 answer:
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a-3b=7
a=7+3b
a+b=87
(7+3b)+b=87
7+4b=87
4b=87-7
4b=80
b=20
a=7+3b
a=7+3*20
a=7+60
a=67
Answer:
C
Step-by-step explanation:
Given
+
← factor the denominator of first fraction
= +
Multiply the numerator/ denominator of second fraction by (x + 2)
= +
The denominators are now common, so add the numerators leaving the denominator, that is
=
= → with numerator 4x + 6 → C
Answer:
The probability that the next customer will purchase a wireless phone is 0.1
Step-by-step explanation:
The relative frequency approach states<em> how often something happens divided by all outcomes</em>.
In the example some of the customers entering a supermarket purchased a wireless phone.
Here all outcomes are 500 customer entering supermarket. And among these outcome purchasing wireless phone happened 50 times.
Then the probability that the next customer will purchase a wireless phone is
.
If we divide both sides by 50, we get =0.1