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Mekhanik [1.2K]
4 years ago
10

Evaluate the expression 2x +y for x=7and y=6

Mathematics
2 answers:
ddd [48]4 years ago
5 0

Answer:

answer is 14

Step-by-step explanation:

2(7)=14

6(1)= 6

14+6=20

pemdas

parenthesis

exponents

multiplication

division

addition

subtraction

Andre45 [30]4 years ago
3 0

Answer: 20

Step-by-step explanation:

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the difference of a two digit number and the number obtained on reversing the digit is always divisible by 9 (true or false) ​
Shkiper50 [21]

Answer:

Yes!

Step-by-step explanation:

I know this from having been a bank teller. But let's examine the math.

Any two digit number can be written as 10x + y.

Reverse the digits would give you

10y + x

Subtract to find the difference.

10x + y - (10y + x)

10x + y - 10y - x

10x - x - 10y + y

9x - 9y

9(x - y)

Yes, it has 9 as a factor, so it is a multiple of 9.

5 0
3 years ago
Four different prime numbers, each less than 20, are multiplied together. What is greatest possible result?
valentinak56 [21]

Answer:

46,189

Step-by-step explanation:

The prime numbers that are less than 20 are :

1,2,3,5,7,11,13,17,19

to get the greatest value, we multiply the four numbers with the largest values i.e

11 x 13 x 17 x 19 = 46,189

8 0
3 years ago
1. The ratios of the measures of the angles of a triangle are 3:4:11. What is the measure of the largest angle?
lora16 [44]

Answer:

1. 110 degrees.

2.  276 students.

Step-by-step explanation:

1.  Converting the ratios to fractions:

3 + 4 + 11 = 18  so the largest angle is 11/18 of 180 degrees.

Answer is 180 *  11/ 18 = 110 degrees.

2.   That would be 460 * 36 / 60

= 276 students.

7 0
3 years ago
Which graph shows the solution set for 2x+3&gt;-9?<br> -1 0 1 2<br> 83-854-32-1012<br> BB5432-1012
Dvinal [7]

Answer:

pretty sure it's the 4th one

Step-by-step explanation:

the answer is x>-6

so x is greater than negative 6

8 0
3 years ago
Assume that the probability of having sickle cell anemia is 0.15 and the probability of being African-American is 0.45 in a give
irina1246 [14]

Answer:

the probability of having sickle cell anemia given that you are African-American is  P( B|A) =0.288

Step-by-step explanation:

Using Bayes's theorem

P( B|A) = P( A∩B)/P(A)

where P( B|A) = probability of the event B knowing that A happened , P( A∩B) = probability that A and B happen (joint probability of A and B) , P(A) = probability of event A

if B= probability of having sickle cell anemia and A= probability of being African-American

then

P( A∩B) = 0.13

P(A) = 0.45

then

P( B|A) = P( A∩B)/P(A)  = 0.13/0.45 = 0.288

P( B|A) =0.288

5 0
4 years ago
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