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4 years ago

Help! Best/Correct answer = Brainiest.

Mathematics

1 answer:

zubka84 [21]4 years ago

5 0

Answer:

Step-by-step explanation:

looking at the graph,

when x = 3, y = -10

-10 = 2(3)^2 + 3b + 8

-10 = 18 + 3b + 8

-10 = 26 + 3b

3b = -36

b = -36/3

b = -12

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The triangles are similar. The area of the larger triangle 603cm2. what is the area of the smaller triangle?

tekilochka [14]

The smaller triangle is scaled by a factor of (18 cm)/(54 cm) = 1/3 of the larger triangle. The ratio of areas is the square of that scale factor.

small triangle area = (1/3)^2 × large triangle area

... = (1/9) × 603 cm^2

... = 67 cm^2

The appropriate choice is

... C. 67 cm^2

6 0

3 years ago

What is a simpler form of the expression? (4k + 5)(3k^2 - 4k - 4)

Maru [420]

Answer:

$12k^3 -k^2-36k-20$

Step-by-step explanation:

Step 1: Distribute

$(4k + 5)(3k^2 - 4k - 4)$

$(4k * 3k^2)+(4k*-4k)+(4k*-4)+(5*3k^2)+(5*-4k)+(5*-4)$

$12k^3-16k^2-16k+15k^2-20k-20$

Step 2: Combine like terms

$12k^3+(-16k^2+15k^2)+(-16k-20k)-20$

$12k^3 -k^2-36k-20$

Answer: $12k^3 -k^2-36k-20$

4 0

3 years ago

3log4^x=log4^32+log4^2

Talja [164]

Hope this would help you

3 0

3 years ago

The length of a rectangular mailing label is

galben [10]

Let w be the width

Then the length is 2w - 2

We also know that the perimeter is 62 cm. The perimeter is the distance around the rectangle, or 2w + 2(2w - 2).

So, 2w + 2(2w - 2) = 62

2w + 4w - 4 = 62

6w = 66

w = 11

So, the length is 2w - 2 = 2(11) - 2 = 22 - 2 = 20

Length = 20 cm

Width = 11 cm

5 0

3 years ago

4/5 minus 1/3 plz i need help

IRISSAK [1]

Answer:

7/15

Step-by-step explanation:

Step 1

We can't subtract two fractions with different denominators. So you need to get a common denominator. To do this, you'll multiply the denominators times each other... but the numerators have to change, too. They get multiplied by the other term's denominator.

So we multiply 4 by 3, and get 12.

Then we multiply 1 by 5, and get 5.

Next we give both terms new denominators -- 5 × 3 = 15.

So now our fractions look like this:

−

Step 2

Since our denominators match, we can subtract the numerators.

12 − 5 = 7

So the answer is:

Step 3

Last of all, we need to simplify the fraction, if possible. Can it be reduced to a simpler fraction?

To find out, we try dividing it by 2...

Nope! So now we try the next greatest prime number, 3...

Nope! So now we try the next greatest prime number, 5...

Nope! So now we try the next greatest prime number, 7...

Nope! So now we try the next greatest prime number, 11...

No good. 11 is larger than 7. So we're done reducing.

6 0

3 years ago