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2 years ago

What is area of shaded

Mathematics

1 answer:

Naddik [55]2 years ago

8 0

Answer:225

Step-by-step explanation:

we start by finding the area of the unshaded triangles and subtracting them from the total area of the box.

The total length of the top is 20 and the total length of the bottom side is 18

20-18=2 so the small unshaded part on the bottom side is 2. with this we can find the left triangle. triangle area is base times height over 2 so the area of the unshaded triangle on the left is 15*2/2=15.

We know the small unshaded bit on the right side is 6 as it is shown on the diagram. again, we can use base times height over 2 to get the area of the top unshaded triangle. 6*20/2= 60.

We can do base times height to find the total area of the rectangle

15*20=300

300-15-60=225

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Nata [24]

Answer: 15, -8

Step-by-step explanation:

$u_2=7\\u_2=u_1+r\\u_3=u_1+2r\\u_4=u_1+3r\\\\u_1+u_2+u_3+u_4=4u_1+6r=12\\u_1+r=7\\\\$

$\left \{ \begin {array} {ccc|c|c}u_1+r&=&7&-4&-6\\4u_1+6r&=&12&1&1\\\end {array} \right.\\\\\\\left \{ \begin {array} {ccc}2r&=&-16\\-2u_1&=&-30\\\end {array} \right.\\\\\\\left \{ \begin {array} {ccc}r&=&-8\\u_1&=&15\\\end {array} \right.\\\\\\Proof:\\u_1=15\\u_2=7\\u_3=-1\\u_4=-9\\sum=12\\$

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3 years ago

Susan buys a box of 11 oranges for $15.57. Find the unit rate for ONE

harkovskaia [24]

Answer:

$1.42

Step-by-step explanation:

So to find a unit rate just divide

15.57/11= 1.42 (rounded)

7 0

3 years ago

The total profit P of manufacturing x hundred DVD's is given by the equation below.

hichkok12 [17]

Answer:

x = -7.5

Step-by-step explanation:

P = 600 + 1,500x − 100x^2

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x = -b/2a

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4 years ago

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anygoal [31]

Answer:

$\frac{2}{3}$

Explanation:

What we need to do is to convert $\frac{8}{12}$ into a new - but still equal - fraction, one with a denominator of 3. In order to convert a fraction, you either divide or multiply both the denominator and the numerator by the same number.

We know that the answer has to be a fraction with the denominator of 3. Take a look at the denominator of $\frac{8}{12}$ - it's 12. Ask yourself: 12 divided by what number equals 3? That number would 4.

So, divide 8 by 4 as well and you would get 2. Therefore, the numerator would be 2 and the answer is $\frac{2}{3}$ .

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4 years ago

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Vika [28.1K]

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5 0

3 years ago