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Brut [27]
3 years ago
15

Evaluate the expression 2x - 3y for x = -6 and y = -7

Mathematics
2 answers:
erica [24]3 years ago
4 0

Answer: 9

Step-by-step explanation:

First, you substitute the -6 and -7 for x and y. 2(-6) - 3(-7). Then, you do the first part of the equation: 2(-6)= -12. Then do the second part -3 (-7) which is 21 (remember positive x positive = positive). Then you are left with -12+ 21 which is 9.

timofeeve [1]3 years ago
3 0

Answer9

Step-by-step explanation:

mark brainliest PLEASE

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A city's population increases by 5% every year. If its population today is 300,000, write a function that models the population
ratelena [41]

Answer:

f(x) = 300,000(1.05)^x

Step-by-step explanation:

Use the exponential growth equation:

f(x) = a(1 + r)^x

Plug in 300,000 as a, since it is the original population:

f(x) = 300,000(1 + r)^x

The city's population is growing at 5% each year, so plug in 0.05 as r:

f(x) = 300,000(1 + 0.05)^x

f(x) = 300,000(1.05)^x

So, the function for the population growth is f(x) = 300,000(1.05)^x

6 0
3 years ago
A first number plus twice a second number is 9. Twice the first number plus the second totals 27. Find the numbers
SOVA2 [1]
Create a a system of 2 equations: 2x + y = 27 and 2y + x = 9, with x being the first number and y being the second. solve for the two variables and you'll get the first number is 15 and the second is -3.
6 0
4 years ago
PLZ HELP ME OVER HERE!!
riadik2000 [5.3K]

Answer:

x = 5

Step-by-step explanation:

If x + 5 = 10, then x would have to be 5 because 5 + 5 = 10.

The way you would solve this would be:

x + 5 = 10

subtract 5 from both sides of the equation

x + 5 - 5 = 10 - 5

simplify:

x = 5

5 0
3 years ago
Write a linear function from the table.
3241004551 [841]

Answer:

It would be A.

Step-by-step explanation:

Because, 5 x 0 is 0, 5 x 1 is 5, 5 x 2 is 10, and so on. Its really just counting in 10s.

3 0
3 years ago
What is the answer for (a^2+12c)÷7b-1
vodomira [7]

Answer:

Step-by-step explanation:

Integer roots:

a = 6 n + 1, b = 7, c = -3 n^2 - n, n element Z

a = 6 n + 5, b = 7, c = -3 n^2 - 5 n - 2, n element Z

Derivative:

d/da(1/7 (a^2 + 12 c) b - 1) = (2 a b)/7

Indefinite integral:

integral(-1 + 1/7 b (a^2 + 12 c)) da = (a^3 b)/21 + (12 a b c)/7 - a + constant

Related Queries:

5 0
3 years ago
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