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3 years ago

Equations that equal 60 with numbers 15,17,9,5,25,19,7,10,31

Mathematics

1 answer:

Amanda [17]3 years ago

3 0

9x5+5=60

Step-by-step explanation:

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Part B

lianna [129]

Answer:

Soccer: 19 Males

Basketball: 29 females

Total: 40 males, 60 females

Step-by-step explanation:

MALES FEMALES TOTAL

SOCCER ║ 19 ║ 31 ║ 50 ║

BASKETBALL║ 21 ║ 29 ║ 50 ║

TOTAL ║ 40 ║ 60 ║ 100 ║

[OPTIONS ⇒ 19, 29, 40, 60]

SOCCER:

x + 31 = 50

50 − 31 = 19

19 males

BASKETBALL

21 + y = 50

50 − 21 = 29

29 females

TOTAL:

F: 31 + 29 = 60

M: 19 + 21 = 40

60 + 40 = 100

60 females

40 males

6 0

3 years ago

Match each differential equation to a function which is a solution.

inessss [21]

Answer: 1 - C

2 - E

3 - no answer

4 - B

Step-by-step explanation:

A. $y = 3x+x^2$

$y' = 3 + 2x\\y'' = 2$

Replace in 1:

$y'' + y = 0$

$2 + 3x + x^2 \neq 0$

So, A is not an answer for 1

Replace in 2:

$y' = 3y$

$3+2x = 3(3x + x^2)$

So, A is not an answer for 2

Replace in 3

$2x^2y'' + 3xy'= y$

$2x^2(2) + 3x(3 + 2x) = 4x^2 + 9x + 6x^2 \neq 3x+x^2$

So, A is not an answer for 3

Replace in 4

$y'' + 6y' + 8y = 0$

$2 + 6(3+2x)+8(3x + x^2) = 2+18+12x+24x+8x^2 \neq 0$

So, A is not an answer for 4

B. $y = e^{-4x}$

$y' = -4e^{-4x}$

$y'' = 16e^{-4x}$

Replace in 1

$y'' + y = 0$

$16e^{-4x} -4e^{-4x} = 12e^{-4x} \neq 0$

So, B is not an answer for 1

Replace in 2

$y' = 3y$

$-4e^{-4x} \neq 3e^{-4x}$

So, B is not an answer for 2

Replace in 3

$2x^2y'' + 3xy' = y$

$2x^2(16e^{-4x}) +3x(-4e^{-4x}) \neq e^{-4x}$

So, B is not an answer for 3

Replace in 4

$y'' + 6y' +8y = 0$

$16e^{-4x} + 6(-4e^{-4x}) + 8e^{-4x} = e^{-4x}(16-24+8) = 0$

So, B is an answer for 4

C. $y = sin(x)$

$y' = cos(x)$

$y'' = -sin(x)$

Replace in 1

$y'' + y = 0$

$-sin(x) + sin(x) = 0$

So, C is an answer for 1

We jump to

D. $y = x^{12}$

$y' = 12x^{11}$

$y'' = 132 x^{10}$

Replace in 2

$y' = 3y$

$12x^{11} \neq 3x^{12}$

So, D is not an answer for 2

Replace in 3

$2x^2y'' + 3xy' = y$

$2x^2(132x^{10}) + 3x(12x^{11}) = 300x^{12} \neq x^{12}$

So, D is not an answer for 3

E. $y = 6e^{3x}$

$y' = 18e^{3x}$

$y'' = 54e^{3x}$

Replace in 2

$y' = 3y$

$18e^{3x} = 3(6e^{3x}) = 18e^{3x}$

So, E is an answer for 2

3 0

3 years ago

A machine at a food-distribution factory fills boxes of rice. The distribution of the weights of filled boxes of rice has an app

lakkis [162]

Answer:

c thats all

Step-by-step explanation:

6 0

3 years ago

4.3cm round to 3 decimal places?

jonny [76]

Answer:

0.4

Step-by-step explanation:

4 0

3 years ago

Equation for y-intercept

Alex787 [66]

y=mx+b

Where m is the slope
and b is the y-intercept

8 0

3 years ago

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