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Mathematics

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Pie3 years ago

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Answer:

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What is the value of the expression -78-a, when a= -29?

Lady bird [3.3K]

ANSWER:
-78-a
= -78-(-29)
= -78+29
= -49

3 0

3 years ago

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Solve for x.<br> <br> 13x + 7 = 5x - 20

myrzilka [38]

The answer is -27/8= -3.375

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3 years ago

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Wich expression can be used to find the slope of a line containing the points (-3,2) and (7,-1)

docker41 [41]

$A(x_1;\ y_1);\ B(x_2;\ y_2)\\\\\text{The slope:}\ m=\dfrac{y_2-y_1}{x_2-x_1}$

$\text{We have:}\\(-3;\ 2)\to\ x_1=-3;\ y_1=2\\(7;\ -1)\to x_2=7;\ y_2=-1$

$\text{substitute}\\\\m=\dfrac{-1-2}{7-(-3)}=\dfrac{-3}{10}=-\dfrac{3}{10}$

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3 years ago

A teacher has 100 chairs to arrange for an assembly into equal rows Write one way the chairs could be arranged Include the numbe

tiny-mole [99]

That's easy if there is 100 chairs there would be 10 rows with ten chairs in each row

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3 years ago

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Two ropes are attached to a large ballon in a parade. The people holding the ropes are 40 feet apart,and the angle between the t

tankabanditka [31]

Answer:

We'll use the Law of Sines:

Sine (C) / c = Sine (B) / b

Sine (86) / 40 = Sine (52) / b

0.99756 / 40 = 0.78801 / b

0.024939 = .78801 / b

b = .78801 / .024939

side b = 31.5974978949 feet

Sine (42) / a = Sine (86) / 40

(0.66913 / a) = 0.024939

a = .66913 / .024939

side a = 26.8306668271 feet

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8 0

3 years ago

I will send a picture ​

I will send a picture