Ask question

Ask question

All categories

chubhunter [2.5K]

3 years ago

5

Mike bought 5 new baseball trading cards to add to his collection . the next day hos dog ate half of his collection. there are n

ow only 40 left. how many cards did Mike start with?

1 answer:

Sav [38]3 years ago

8 0

i think the answer would be 75

You might be interested in

The teacher asked a different group of students to make a batch of orange paint that had a ratio of ¼ cups yellow to ¾ cups of r

vazorg [7]

I can’t answer without the packet

4 0

2 years ago

The distance d of a particle moving in a straight line is given by d(t) = 2t3 + 5t – 2, where t is given in seconds and d is mea

Sergeeva-Olga [200]

Answer:

(C) $6t^2+5$

Step-by-step explanation:

Given the distance, d(t) of a particle moving in a straight line at any time t is:

$d(t) = 2t^3 + 5t - 2, $ where t is given in seconds and d is measured in meters.$

To find an expression for the instantaneous velocity v(t) of the particle at any given point in time, we take the derivative of d(t).

$v(t)=\dfrac{d}{dt}\\\\v(t) =\dfrac{d}{dt}(2t^3 + 5t - 2) =3(2)t^{3-1}+5t^{1-1}\\\\v(t)=6t^2+5$

The correct option is C.

6 0

2 years ago

Please give me the answer and why

masha68 [24]

Answer:

1 black

Step-by-step explanation:

one more black to reach 3:2

3 0

3 years ago

3n² + 2n - 8=0<br> Solve each equation with the quadratic formula

8_murik_8 [283]

Answer:

-2,4/3

Step-by-step explanation:

ax²+bx+c=0

$x=\frac{-b \pm\sqrt{b^2-4ac} }{2a} \\3n^2+2n-8=0\\n=\frac{-2\pm\sqrt{2^2-4*3*(-8)} }{2*3} \\n=\frac{-2 \pm \sqrt{4+96}}{6} }\\n=\frac{-2 \pm 10}{6} \\n=\frac{8}{6} =\frac{4}{3}\\or~n=\frac{-12}{6}=-2$

8 0

2 years ago

The sides of a square are all increased by 3 cm. The area of the new square is 64 cm'.

brilliants [131]

Side of the original square is 5 cm.

Step-by-step explanation:

Step 1: Let the side of the original square be x. Then side of the new square = x + 3 and Area of new square = 64 cm²

Area of a square = (side)²

⇒ 64 = (x + 3)²

⇒ 64 = x² + 6x + 9

⇒ x² + 6x - 55 = 0

⇒ x² + 11x - 5x - 55 = 0 (Since 6x = 11x - 5x as part of factorizing)

⇒ x(x + 11) - 5(x + 11) = 0

⇒ (x + 11)(x - 5) = 0

⇒ x = -11 and x = 5 (Lengths can't be negative)

Side of the original square is 5 cm.

4 0

2 years ago