4. Plz mark as brainliest plzz
Answer:
c = 3
Step-by-step explanation:
Using the rule of exponents
= 
note that 32 = 
and 8 = 2³ , then
= 
, becomes
= 
= 
Since the bases on both sides are equal, both 2, then equate the exponents
10c = 3c + 21 ( subtract 3c from both sides )
7c = 21 ( divide both sides by 7 )
c = 3
Answer:
answer b.
Step-by-step explanation:
Answer:
16%.
Step-by-step explanation:
We may assume that the times are normally distributed.
We first find the z-score which is the (value - mean) / standard deviation.
z-score = (4 - 6)/2 = -1.
Looking up the value for -1 on a z-score normal distribution table we find that -1 gives us 0.1587 - that is 16%.
Answer:
Step-by-step explanation:
Here you go mate
Use PEMDAS
Parenthesis,Exponent,Multiplication,Division,Addition,Subtraction
Step 1
4(x+9)=76 Equation/Question
Step 2
4(x+9)=76 Remove parenthesis by multiplying 4
4x+36=76
Step 3
4x+36=76 Subtract 36 from sides
4x=40
Step 4
4x=40 Divide sides by 4
answer
x=10
Hope this helps
