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2 years ago

Which property is represented? 7(t + U) = 7t + 70

Mathematics

1 answer:

Nikitich [7]2 years ago

3 0

Answer:

t=-7u+70/0

Step-by-step explanation:

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Number sense which subtraction sentences show you how to find 15- 7

Mars2501 [29]

You can use addition to solve this problem. 7+_= 15

6 0

3 years ago

70% of kids who visit a doctor have a fever, and 40% of kids who visit a doctor have a sore throat. If the probability that a ki

krek1111 [17]

Answer:

52.5%

Step-by-step explanation:

Let A be kids who have a fever, and B be kids who have a sore throat, so

Based on the given information we have

P(A) = 70%, P(B) = 40%, and P(B|A) = 30% (B|A is read as "B given A", which means probability of B happening given that A has already happened)

We are asked to find P(A|B), the probability of a kid having a fever given that we already know he has a sore throat.

Step 1: First find P(A and B), this is the probability of a kid having both a fever and a sore throat. We use the formula

P(B|A) = P(A and B)/P(A)

We have 2 of these values listed above, so we plug them in...

30% = P(A and B)/70%

This give us a value for P(A and B) which equals 21% [multiply both sides by 70% to isolate P(A and B), (30%)(70%) = 21%]

Now we flip the equation to P(A|B), which is

P(A|B) = P(A and B)/P(B)

We have 2 of the values, so we plug them in...

P(A|B) = 21%/40%

This gives us a value of 52.5% (divide 21% by 40%)

6 0

3 years ago

Emma went to a salon to get her hair cut. The price of the haircut is $65. She wants to leave a 20% tip. What is the total amoun

Rudiy27

Answer:

She should leave a total of $78.

Step-by-step explanation:

To find this, we first need to find the tip amount. We can do this by multiplying the total by the tip percentage.

$65 * 20% = $13

Now that we have that, we need to add it to the cost.

$65 + $13 = $78

8 0

3 years ago

How many terms are in the expression below n2 + 6n - 3

dmitriy555 [2]

There is three terms in the expression "n2+6n-3".

In Algebra a term is either a single number or variable, or numbers and variables multiplied together. Terms are separated by + or − signs, or sometimes by divide.

7 0

3 years ago

Daniel deposits $300 into an account that earns 16% interest annually. Which equation can be used to model his account balance,

MAVERICK [17]

Answer:

$y=300(1+0.16)^x$

Step-by-step explanation:

<h2>This account can be modeled using the compound interest formula.</h2><h2>the compound interest formula is expressed as</h2>

$A= P(1+r )^t$

Where

A =final amount = y

P=initial principal balance = $300

r=interest rate = 16%= 0.16

t=number of time periods elapsed= x

Hence the equation to model his account balance/ final amount A (y) after time (x) years is

$y=300(1+0.16)^x$

5 0

2 years ago