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4 years ago

List all the prime numbers beteen 1-20

1 answer:

7 0

2, 3, 5, 7, 11, 13, 17, 19

Hope this helps.

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Which of the coordinates is equal to cos(50)

valkas [14]

Answer:

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Step-by-step explanation:

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3 years ago

please help me i need to submit my math test on 9:59am please help me i really really need help please

Alex Ar [27]

Answer:

7.1 in

Step-by-step explanation:

use the pythagorean theorem

3.1^2+6.4^2=c^2

9.61+40.96=50.57

***IMPORTANT remember to square root the answer you get. it will still be in c^2 form. so 50.57 wouldn't be the real answer, and instead would be 7.1

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3 years ago

What is mDBA+b+mCBE? Explain how you know.

harkovskaia [24]

Answer:

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Step-by-step explanation:

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3 years ago

Find the points of intersection of the lines 10x−4y=2 and 2x+8y=7 without graphing.

Jet001 [13]

Answer:

$x=\frac{1}{2},y=\frac{3}{4}$

Step-by-step explanation:

Given:

$10x-4y=2 ,2x+8y=7$

To find: points of intersection of the given lines

Solution:

In substitution method, the system of equations is solved by expressing one variable in terms of another, as a result, removing one variable from an equation.

$10x-4y=2 \\2(5x-2y)=2\\5x-2y=1\\5x=1+2y\\x=\frac{1+2y}{5}$

Put $x=\frac{1+2y}{5}$ in the equation $2x+8y=7$

$2x+8y=7\\2[\frac{1+2y}{5}]+8y=7\\ 2+4y+40y=35\\44y=35-2\\44y=33\\y=\frac{33}{44}\\ =\frac{3}{4}$

Put $y=\frac{3}{4}$ in the equation $x=\frac{1+2y}{5}$

$x=\frac{1+2y}{5}\\=\frac{1}{5}[1+2(\frac{3}{4})]\\=\frac{1}{5}[1+(\frac{3}{2})]\\\\=\frac{1}{5}(\frac{2+3}{2}) \\\\=\frac{1}{5}(\frac{5}{2})\\\\=\frac{1}{2}$

Therefore,

$x=\frac{1}{2},y=\frac{3}{4}$

5 0

3 years ago

What is the value of b?

NeX [460]

Answer:

C. 42

Step-by-step explanation:

7 0

2 years ago