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2 years ago

Vlad spent 20 minutes on his history homework and then completely solved x math problems that each took 2 minutes to

Mathematics

1 answer:

Makovka662 [10]2 years ago

4 0

Answer:

Step-by-step explanation:

The answer will be A. y=2x+20; x is any integer greater than or equal to 0, and y is an integer greater than or equal to 20.

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Factorise x squared + 3x + 2

Zielflug [23.3K]

Answer:

$(x + 2)(x + 1)$

Step-by-step explanation:

by factorising ;

=》

${x}^{2} + 3x + 2$

=》

${x}^{2} + 2x + x + 2$

=》

$x(x + 2) + 1(x + 2)$

=》

$(x + 2)(x + 1)$

i hope it helped.....

8 0

2 years ago

The total cost of 4 starfish was $7.20. Write and solve an equation to find how much one starfish cost.

Lyrx [107]

Answer:

$1.80

Step-by-step explanation:

4x = 7.20

x = 1.80

7 0

2 years ago

Is the square number of 32 a whole number?

Aneli [31]

No it’s not the square root of 32 is 5.65685424949

4 0

3 years ago

Read 2 more answers

PLEASSSSSEEE NEED HELP ASAP ALOT OF POINTS BIGGG POINTS PLEASSSS

Elena-2011 [213]

2. x = 8, -4
|x-2|
2 * x-2=12
2x-4=12
2x=16
x=8
-4 - 2 = -6
-6 x 2 = 12

3 0

2 years ago

Show that y=cos(t)y=cos(t) is a solution to (dydt)2=1−y2(dydt)2=1−y2. Enter your answers below in terms of the independent varia

GrogVix [38]

Answer:

$(\frac{dy}{dt})^2=sin^2t$

Step-by-step explanation:

$y=cost$

DE : $(\frac{dy}{dt})^2=1-y^2$

If y is a solution of given DE then it satisfied the DE.

Differentiate w.r.t t

$\frac{dy}{dt}=-sint$

Using the formula

$\frac{d(cosx)}{dx}=-sinx$

LHS: $(\frac{dy}{dt})^2=(-sint)^2=sin^2t$

RHS

$1-y^2=1-cos^2t=sin^2t$

By using the formula

$sin^2t=1-cos^2t$

LHS=RHs

Hence, y is a solution of given DE

$(\frac{dy}{dt})^2=sin^2t$

7 0

3 years ago