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3 years ago

Write an numerical expression for "6 times the sum of 4 and 5." A) 4 + 5 x 6 B) 6 x (4 - 5) C) 6 x (4 + 5) D) 6 x 4 + 5

2 answers:

8 0

C) 6 x (4 + 5) because “6 times” is 6 x and then it’s “sum of 4 and 5” which is 4+5. You have to put 4+5 in parentheses because otherwise the 6 would multiply with 4

Andreas93 [3]3 years ago

6 0

Answer:

C) 6x(4 + 5)

Step-by-step explanation:

This the only one that makes sense. A doesn't work because of pemdas. You'd have to multiply before adding. B doesn't work because the original problem doesn't call for subtraction at all. And D doesn't work for the same reason that A doesnt.

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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

8 0

2 years ago

PLEASE HELP ASAP WITH NUMBER 7!!

Marizza181 [45]

Answer: The answer is F.

Step-by-step explanation:

1.) The first equation represents how the spiral notebook has 30 more pages than the the memo book, and how subtracting the memo book's pages would result with 30.

2.) The second equation represents how the total number of pages in 3 spiral notebooks plus 5 memo books would result in 810 total pages.

4 0

2 years ago

Is Alexis drove her car for three hours and drove 150 miles and then drove her car for 350 miles in four hours what is her avera

goblinko [34]

Total miles:350+150=500
Total hours:4+3=7
Avg speed:500/7=71.429 mph

4 0

3 years ago

Factor the expression 15x^2-16xy+4y^2

Zepler [3.9K]

(5x-2y)(3x-2y)

Dont give me anything give it to the other lad down there

6 0

3 years ago

Read 2 more answers

You spend 1/5 of your income on car payment. You spend 3/8 of the remainder of your income on rent. What fraction of income is s

kenny6666 [7]

Answer:

3/10

Step-by-step explanation:

1/5 of total income - spent on car

remainder  income = 4/5

3/8 of remainder = 3/8 ×4/5 = 3/10(of total income spent on rent)

the word "of" means you can find it by multiplication

e.g. 2 of 1/2 means 2 × 1/2 which is 1

5 0

2 years ago