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ivolga24 [154]
2 years ago
6

Workout the value for 3x^2-5y

Mathematics
1 answer:
ale4655 [162]2 years ago
6 0
Remember to do PEMDAS so your answer is not correct, since you multiplied before doing the parentheses/exponents.

Explanation:
3(3)^2- 5(4)
= 3(9) - 5(4)
= 27 - 20 = 7
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Given two positive even integers, it turns out that the square of the largest minus 10 times the smaller is 76. What is the sum
kolbaska11 [484]

Answer:

  26

Step-by-step explanation:

Even integers will only have a square ending in 6 if they end in 4 or 6.

The square will only have a value greater than 76 if the number is greater than 8, that is, 14 or 16, 24 or 26, and so on.

The "smaller" integer will only be smaller if the "larger" integer is less than 16.

So, the two integers are ...

  14 and (14^2 -76)/10 = 12

The sum of 14 and 12 is 26.

_____

In the graph, we let x represent the "larger" integer and y the "smaller". The shaded area is where x > y, and the curve is the constraint on their values. The two vertical lines are the even numbers whose squares end in 6, resulting in integer values for y.

3 0
3 years ago
Y is directly proportional to x squared. if y=12 when x=2 find x when y=48
Alexxx [7]

Answer:

x = 4

Step-by-step explanation:

y = kx²

NOTE: k is constant for proportionality

putting values for x and y

if x is 2

and y is 12

12 = k(2)²

12 = k4

12 = 4k

divide both sides by coefficient of k

12÷4 = 4k ÷ 4

k=3

substitute 3 for k

therefore when

y is 48

and k is constant 3

then x will be:

48=3x²

divide both sides by coefficient of x²

48 divide by 3 = 3x² divide by 3

16=x²

take the square root of both sides

√16 = √x²

x = 4

8 0
3 years ago
Can 25/35 be simplified?
anygoal [31]
Yes. 25 and 35 both go into 5 so 25=5, 35=7.
So the answer is 5/7.
Hope this helps :)

3 0
3 years ago
Read 2 more answers
Help me with this please it's important pleaseeeeeeeeeeeeeeeeee frindes
Stells [14]

Answer:

27-64

Step-by-step explanation:

cheating in tests are bad, searching for answers in tests is also bad

but the range is 27-64

3 0
3 years ago
LITERALLLLLLY DO AT 12
Lyrx [107]

Answer:

New England had skilled craftsmen in the industry of shipbuilding. The Mid-Atlantic presented a diverse workforce of farmers, fisherman, and merchants. The Southern Colonies were primarily agricultural with few cities and limited schools.

Hope this helped :)

7 0
3 years ago
Read 2 more answers
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