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3 years ago

Uh my brain cells are gone- help me T^TTTT directions in picture no links! links = reported

Mathematics

1 answer:

andrezito [222]3 years ago

3 0

X = 72 because this is an isosceles triangle

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Last year the depth of the river was 4.2 feet deep.

aivan3 [116]

Answer:

3.15 ツ

Step-by-step explanation:

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3 years ago

ellie must mix 6 tablespoons of plant food for every 2 gallons of water. If she has 6 gallons of water, how muck plant food shou

gogolik [260]

She need 18 tablespoons of plant food for 6 gallons of water

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4 years ago

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What are the orders of 3,7,9,11,13,17 and 19(mod20)?does 20 have primitive roots?

bezimeni [28]

$3\equiv3\mod{20}$
$3^2\equiv9\mod{20}$
$3^3\equiv27\equiv7\mod{20}$
$3^4\equiv3\cdot3^3\equiv3\cdot7\equiv21\equiv1\mod{20}$

$7\equiv7\mod{20}$
$7^2\equiv49\equiv9\mod{20}$
$7^3\equiv7\cdot7^2\equiv63\equiv3\mod{20}$
$7^4\equiv7\cdot7^3\equiv21\equiv1\mod{20}$

$9\equiv9\mod{20}$
$9^2\equiv3^4\equiv1\mod{20}$

$11\equiv11\mod{20}$
$11^2\equiv121\equiv1\mod{20}$

$13\equiv-7\equiv13\mod{20}$
$13^2\equiv169\equiv9\mod{20}$
$13^3\equiv13\cdot13^2\equiv(-7)9\equiv-63\equiv-3\mod{20}$
$13^4\equiv13\cdot13^3\equiv(-7)(-3)\equiv21\equiv1\mod{20}$

$17\equiv-3\equiv17\mod{20}$
$17^2\equiv(-3)^2\equiv9\mod{20}$
$17^3\equiv(-3)^3\equiv-27\equiv3\mod{20}$
$17^4\equiv(-3)^4\equiv81\equiv1\mod{20}$

$19\equiv-1\equiv19\mod{20}$
$19^2\equiv19(-1)\equiv-19\equiv1\mod{20}$

Generally speaking, a number $x$ coprime to $n$ will be a primitive root of $n$ if we have $x^n\equiv x\mod{n}$ , or $x^{n-1}\equiv1\mod{n}$ . In other words, if $x$ is of order $n-1$ modulo $n$ , then $x$ is a primitive root of $n$ .

Since none of these numbers has order 19, it follows that 20 does not have any primitive roots.

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4 years ago

Select the correct answer. Which equation represents a line that is perpendicular to line FG?

emmasim [6.3K]

Answer:

Hey there!

Equation of Line FG: $y=\frac{1}{2} x+3.5$ , because the slope (rise over run) is 2 and we see that the y intercept is 3.5.

Equation to a Line Perpendicular to FG: $y=-2x-3\\$ , because the equations of perpendicular lines have the same (but could also be different y-intercepts), and opposite reciprocal slopes.

Let me know if this helps :)

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3 years ago

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The same garden shop sells mulch according to the equation y = 20x, where y represents the cost in dollars, and x represents the

romanna [79]

Answer:

Mulch costs $10 more per cubic yard than topsoil.

Step-by-step explanation:

Got 100% on this Test/Usa

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3 years ago

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