3 years ago

Lily has a bag of 30 marbles. 40% are red, 30% are green, and 30% are blue. How many marbles are green and red combined?

Mathematics

1 answer:

RoseWind [281]3 years ago

3 0

30% of the 30 marbles is nine and 9-30 = 21 so your answer is 21

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What is the area of a circle with a diameter of 15.8 cm? Use 3.14 for pi and round your final answer to the nearest hundredth. E

wariber [46]

Answer:

A=195.97 cm^2

Step-by-step explanation:

Area of a circle is given by

A = pi r^2

We are given the diameter. We need to find the radius

d= 2r

15.8 = 2r

Divide by 2

7.9 =r

Now we can find the area

A = pi * (7.9)^2

A = pi *62.41

Let pi = 3.14

A = (3.14) * 62.41

= 195.9674 cm^2

We round to the nearest hundredths

A=195.97 cm^2

5 0

3 years ago

Read 2 more answers

Multiply. (2x2 + 4x - 3)(x2 - 2x + 5)

BigorU [14]

For a moment, let $y=x^2-2x+5$ . Then by the distributive property,

$(2x^2+4x-3)p=2x^2p+4xp-3p$

Again by the distributive property,

$2x^2p=2x^2(x^2-2x+5)=2x^4-4x^3+10x^2$

$4xp=4x(x^2-2x+5)=4x^3-8x^2+20x$

$-3p=-3(x^2-2x+5)=-3x^2+6x-15$

Taking everything together, we get

$(2x^2+4x-3)(x^2-2x+5)=(2x^4-4x^3+10x^2)+(4x^3-8x^2+20x)+(-3x^2+6x-15)$
$(2x^2+4x-3)(x^2-2x+5)=2x^4-x^2+26x-15$