Which expression is equivalent to 21 + 49?A 7(3 + 49)

B 7(3 + 7)

C 7(14 + 42)

D 7(14 + 49)

Answers

Answer 1

Answer: It would be the second choice, B. 7(3+7) because when you distribute, you get 21+49, because 7x3=21 and 7x7=49.

Answer 2

Answer: the answer would be b because 3+7 is 10 and multiple that by 7 is 70. and 20 plus 49 is 70

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Solve for x: x-1/4=1/2 help please

Answers

$(x-1)/(4)=(1)/(2)\n\ncross\ multiply\n\n2(x-1)=1\cdot4\n\n2x-2=4\ \ \ /+2\n\n2x=4+2\n\n2x=6\ \ \ /:2\n\nx=6:2\n\nx=3$

(x-1)/4 = (1/2)
(x-1)/4 x 4 = (1/2) x 4
x-1+1 = 2+1
x =3

Use formulas brainiest answer to whoever is first and correct

Answers

Answer:

114

Step-by-step explanation:

A=LxW

19x6=114

The total cost for a bucket of popcorn and 4 movie tickets is $56. The total cost for the same size bucket of popcorn and 6 movie tickets is $80. Which equation represents the relationship between y, the total cost of the popcorn and movie tickets, and x, the number of movie tickets that are purchased

Answers

y+4x=56
y+6x=80

I think these are the two equations that should be used to solve for 'y' and 'x'!!

Answer:

y = 12x + 8y

Step-by-step explanation:

The value of a book is $150 and decreases at a rate of 4% per year. Find the value of the book after 12 years

Answers

If it decreases at 4% every year, then its value becomes:

100% - 4% = 96% = 96/100 = 0.96

At the end of the 1 year its value becomes: 150*(0.96)

At the end of the 2 years its value becomes: 150*(0.96)*(0.96) = 150*(0.96)²

At the end of the 3 years its value becomes: 150*(0.96)*(0.96)*(0.96) = 150(0.96)³

So similarly at the end of 12 years, its value becomes 150*(0.96)¹²

=50*(0.96)¹² simplify with calculator.

≈ 91.91

Value at the end of 12 years becomes ≈ $91.91

I hope this helps.

if 3 times a number added to 2 is divided by the number plus 9 the result is 5 halves. find the number

Answers

Answer:

2/7

Step-by-step explanation:

If f(x)=2(x)^2 + 5 square root (x-2), complete the following statement The domain for f(x) is all real numbers _____ than or equal to 2.

Answers

Answer:

Greater.

Step-by-step explanation:

The in the function , the square root term has to give a real number if is to be real. This can only happen if because if then will give a complex number and therefore will not be real.

Thus, the domain for f(x) is all real numbers greater than or equal to 2.

Answer:

The domain for f(x) is all real numbers greater than or equal to 2.

Step-by-step explanation:

Given function:

$f(x)=2x^2+5 √(x-2)$