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3 years ago

What is 20% interest of 40$ and how?

Mathematics

1 answer:

Dahasolnce [82]3 years ago

6 0

40$×20%=

20%×0,01=0,2

40$×0,2=8
so the 40 with 20%interest would be
40$+8=48$

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A person draws a card from a hat. Each card is one color, with the following probabilities of being drawn: 1/20 for blue, 1/10 f

FromTheMoon [43]

Answer:

1/4

Step-by-step explanation:

4 0

2 years ago

Please help me with algebra part B and C. attachment below. Will mark as brainslist. 25 points.

miv72 [106K]

Answer:

C. $(-7x+60)(x+4)$

Step-by-step explanation:

Consider the expression $-7x^2+32x+240.$

First, note that

$a=-7\\ \\b=32\\ \\c=240$

Find the discriminant

$D=b^2-4ac=32^2-4\cdot (-7)\cdot 240=1,024+6,720=7,744\\ \\\sqrt{D}=\sqrt{7,744}=88$

Now,

$x_1=\dfrac{-b+\sqrt{D}}{2a}=\dfrac{-32+88}{2\cdot (-7)}=-4\\ \\x_2=\dfrac{-b-\sqrt{D}}{2a}=\dfrac{-32-88}{2\cdot (-7)}=\dfrac{60}{7}$

Write the factored form:

$-7x^2+32x+240=-7(x-(-4))\left(x-\dfrac{60}{7}\right)=(x+4)(-7x+60)$

8 0

2 years ago

-4.5x-2y=-12.5 3.25x-y=-0.75 solve by elimination

creativ13 [48]

-4.5x-2y=-12.5 and 3.25x-y=-0.75
we first multiply the second equation by -2
(-2)*(3.25x-y=-0.75)=-6.5x+2y=-1.5
add the equation to eliminate the y
so yo get (-4.5x-6.5x)=(-12.5-1.5)
-11x=-11
x=1
now we plug in x into any equation to solve for y
-45x-2y=-12.5 and x=1
(-45*1)-2y=-12.5
-4.5-2y=-12.5
-2y=-12.5+4.5
-2y=-8
y=4
then your answer is x=1 and y=4

5 0

3 years ago

Help please i only have 3 min to finish

Romashka [77]

Answer: I think that the answer should be 2.4

Step-by-step explanation: The reason why is because they did 2 the 2.2 so their going up by twos I belive making the answer 2.4.

3 0

3 years ago

Read 2 more answers

Write the equation x2=7x in standard form.

seraphim [82]

Answer:

i believe it's x2-7x=0

Step-by-step explanation:

8 0

2 years ago