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3 years ago

Jack is 2 years older than Bob. What was the difference between their ages one year ago? PLS HELP MY BRAIN IS DUM TODAY :(

Mathematics

1 answer:

viva [34]3 years ago

7 0

Answer:

Well, I'm guessing it's still gonna be 2 years age diff. I'm 18 months older than my sister no matter if it was years ago... I am just guessing so..

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Solve y' + 2xy = 2x^3, y(0) = 1.

dalvyx [7]

This is an ODE of the form y' + P(x)y = Q(x)
IF = $e^{ \int\limits {P(x)} \, dx }=e^{ \int\limits {2x} \, dx }=e^{x^2}$
Multiply through by IF
$e^{x^2}y'+2xe^{x^2}y=2x^3e^{x^2} \\ (e^{x^2}y)'=2x^3e^{x^2} \\ \int {(e^{x^2}y)'} \, dx = \int {2x^3e^{x^2}} \, dx \\ e^{x^2}y=x^2e^{x^2}-e^{x^2} + c \\ y=c_1e^{-x^2}+x^2-1$
But y(0) = 1
$1=c_1e^{-(0)^2}+(0)^2-1 = c_1-1 \\ c_1=1+1=2$
Therefore, solution is
$y=2e^{-x^2}+x^2-1$

3 0

3 years ago

The table shows the number of subscribers to several Internet providers. Determine if each statement is true or false.

WITCHER [35]

Answer:

A - True

B - False

Step-by-step explanation:

Looking at option A,

Company B had 3.12 subscribers and earned 119. To find each subscriber's value we divide 119 by 3.12

119/3.12 = 38.14

Looking at Option B,

Company A had 2.45 subscribers and earned 108. To find each subscriber's value, we divide 108 by 2.45

108/2.45 = 44.08

Hence, for Option A, each subscriber paid about $40 is correct because it's close to 38.14

For Option B, each subscriber paid about 30 is incorrect since it's way over, 44.08.

Thus,

A - True

B - False

4 0

3 years ago

WILL MARK BRAINLIEST HELP ASAP

OLga [1]

I’m not sure if this is right. But I think it’s 29

x=4
8(4) -3
32-3=29

4 0

3 years ago

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At Martin Nature Center, the park ranger was showing Mrs. Rhames' class a comparison of a tree's age and the diameter of the tre

sdas [7]

If x is the age and y is the diameter of the trunk, write the equation:
ax+b=y

We must solve for a and b with the given information.

If (x, y) is (1, 4), we have:

a+b=4

If (x, y) is (10, 25), we have:

10a+b=25

Multiply the first equation by 10 to get:

10a+10b=40

Subtract the second equation from this to get:

9b=25

Thus b=25/9. a=4-25/9=11/9, so our equation is 11x/9+25/9=y.

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3 years ago

What is the square root of 900

maksim [4K]

Answer:

Step-by-step explanation:

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3 years ago

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