All categories

1 year ago

NEED HELP

Mathematics

1 answer:

Kaylis [27]1 year ago

7 0

Answer:

75 mph

Step-by-step explanation:

In this kind of problem, "per" means "divided by". To find miles per hour, compute <em>miles divided by hours</em>:

(60 mi)/(4/5 h) = (60×5/4) mi/h = 75 mi/h

Nellie is going 75 miles per hour.

You might be interested in

What does y=x+2, y=2, x=4 mean

PIT_PIT [208]

Step-by-step explanation:

Putting values of x and y

2 = 4 + 2

2 = 6

= 6-2

= 4

4 0

2 years ago

Read 2 more answers

Can someone help me with this???

Veseljchak [2.6K]

The awnser would be 210 because 7 times 10 times 3 is 210

8 0

2 years ago

Write the equation of the line in point-slope form of the given point and slope. This is an essay style question. If you hit the

svp [43]

Answer:

Step-by-step explanation:

The point-slope form of the equation will be expressed as;

y - y0 = m(x-x0) where;

m is the slope

(x0, y0) is the point on the line

Given

Slope m = 3/7

Point (x0, y0) = (7, -2)

Substitute into the equation;

y - y0 = m(x-x0)

y - (-2) = 3/7 (x - 7)

<em>Hence the equation in point-slope form is y + 2 = 3/7(x-7)</em>

3 0

2 years ago

Find a linear second-order differential equation f(x, y, y', y'') = 0 for which y = c1x + c2x3 is a two-parameter family of solu

Alisiya [41]

Let $y=C_1x+C_2x^3=C_1y_1+C_2y_2$ . Then $y_1$ and $y_2$ are two fundamental, linearly independent solution that satisfy

$f(x,y_1,{y_1}',{y_1}'')=0$
$f(x,y_2,{y_2}',{y_2}'')=0$

Note that ${y_1}'=1$ , so that $x{y_1}'-y_1=0$ . Adding $y''$ doesn't change this, since ${y_1}''=0$ .

So if we suppose

$f(x,y,y',y'')=y''+xy'-y=0$

then substituting $y=y_2$ would give

$6x+x(3x^2)-x^3=6x+2x^3\neq0$

To make sure everything cancels out, multiply the second degree term by $-\dfrac{x^2}3$ , so that

$f(x,y,y',y'')=-\dfrac{x^2}3y''+xy'-y$

Then if $y=y_1+y_2$ , we get

$-\dfrac{x^2}3(0+6x)+x(1+3x^2)-(x+x^3)=-2x^3+x+3x^3-x-x^3=0$

as desired. So one possible ODE would be

$-\dfrac{x^2}3y''+xy'-y=0\iff x^2y''-3xy'+3y=0$

(See "Euler-Cauchy equation" for more info)

6 0

2 years ago

A team won 9 of its first 12 games. At that rate, how many games will the team win if it plays 64 games in all?

Feliz [49]

9 out of 12 = 9/12 which can be simplified to 3/4. So the team wins 3/4 of its games. 3/4 of 64 = 64 divided by 4 = 16. 16 x 3 = 48.

3 0

2 years ago

Read 2 more answers

**NEED HELP**

NEED HELP