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3 years ago

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The sum of the numbers from 1 to 10 is 55. The sum of the numbers from 11 to 20 is 155. The sum of the numbers from 21 to 30 is

255. Based on this pattern, what is the sum of numbers from 91 to 100?
A. 855
B. 955
C. 1055
D. 1155

1 answer:

kirill [66]3 years ago

5 0

Answer: B

Step-by-step explanation:

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X + 3y < -18<br> 5x + 2y <14

Kryger [21]

Answer:

<h2>The solution will be the shaded region for both.</h2>

Step-by-step explanation:

First we need to solve x + 3y = -18 and 5x + 2y = 14.

$x = -18 - 3y$ .

Putting the above value in the second equation, we get, $5x + 2y = 14\\5(-18 - 3y) + 2y = 14\\-90 -15y - 2y = 14\\17y = - 104\\y = - \frac{104}{17} = 6.2$ .

Hence, $x = -18 - 3y = -18 -3\times\frac{104}{17} = -36.353$

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3 years ago

There are 3 boys for every 4 girls in a classroom. If there are 9 boys, how many girls are in the classroom?

Sholpan [36]

Answer:

36 girls in the class

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3 years ago

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If P = 4x^4 - 3x^3 + x² - 5x + 11 and Q = -3x^4 + 6x^3 - 8x² + 4x - 3, what is P - 2Q?

vazorg [7]

Answer:

10x^4-15x^3+17x^2-13x+17

Step-by-step explanation:

P-2Q

Replace P and Q with the given values,

4x^4-3x^3+x^2-5x+11-(2(-3x^4+6x^3-8x^2+4x-3)

4x^4-3x^3+x^2-5x+11-(-6x^4+12x^3-16x^2+8x-6)

4x^4-3x^3+x^2-5x+11+6x^4-12x^3+16x^2-8x+6

10x^4-15x^3+17x^2-13x+17

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3 years ago

Which is bigger 20% of 300 or 1/4 of 200

worty [1.4K]

To find 20% of 300, multiply .2 x 300 = 60
60 is 20% of 300

1/4 = 25%
to find 25% of 200, multiply .25 x 200 = 50
50 is 1/4 of 200

20% of 300 is more than 1/4 of 200

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3 years ago

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The circumference of the circle-shaped rug is 56.52 inches. What is the area of the rug?

Elena-2011 [213]

56.52 ÷ pi(3.14) = 18

18 ÷ 2 =9

A = pi(3.14)r^2
A = 3.14 × 9^2
A = 3.14 × 81
A = 254.34in^2

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3 years ago