Determine if these expression is equivalent or not. 7+7x;7(x+1/7) 2.5(3+x);2.5x+7.5

1 answer:

4 0

$7(x+\frac{1}{7})=7 \times x+7 \times \frac{1}{7}=7x+1 \not= 7+7x \\
not \ equivalent \\ \\
2.5(3+x)=2.5 \times 3+ 2.5 \times x=7.5+2.5x=2.5x+7.5 \\
equivalent$

You might be interested in

I seriously need help. Please help. Be brainliest answer

WITCHER [35]

12a) yes, there will be two vanilla cupcakes left over after the baker makes ten more.

7 0

3 years ago

You are given 3 to 1 odds against tossing three tails with three coins, meaning you win $3 if you succeed and you lose $1 if

valentina_108 [34]

Step-by-step explanation:

To find the E(X) expected value, you come up with the different probabilities for each outcome
your set of outcomes after 3 tosses would be = {HHH, HHT, HTH, THH, HTT, THT, TTH, TTT} where H is heads and T is tails
Each element has a probability of 1/8 so let x represent number of tails
$Probability(x)=P(x)\\P(0)=\frac{1}{8} \\P(1)=\frac{3}{8} \\P(2)=\frac{3}{8} \\P(3)=\frac{1}{8}$
The E(x)=Summation (x times P(x))
$E(X)=(0)(0.125)+(1)(0.375)+(2)(0.375)+(3)(0.125)=1.5$
Now which probability is 1.5 tails? None, so it is either 2 tails or 1 tails
So you can expect to lose money in 1 game
But as you play more games the probability of getting 3 tails becomes more and more likely, so you can expect to win in a 100 games