3 years ago

How many solutions does the following system have 3x+2y=1 -9x-6y=3

Mathematics

1 answer:

Sladkaya [172]3 years ago

7 0

Since there are 2 variables there will be 2 answers.

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A plane is approaching an aircraft carrier at 25° angle of elevation from 3.2 miles away how far above sea level is the plane

s2008m [1.1K]

Answer:

$Height\approx 1.35\ miles$

Step-by-step explanation:

The angle of elevation $=25\textdegree$

It is $3.2\ miles$ away from the point.

If we imagine a right triangle having an angle $25\textdegree$ .

Hypotenuse $=3.2$ , Opposite=Height from sea level $(h)$

$\sin 25=\frac{opposite}{hypotenuse}\\\\\sin 25=\frac{h}{3.2}\\\\h=3.2\times \sin 25\\\\h=3.2\times 0.4226\\\\h=1.3524\approx 1.35\ miles$

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3 years ago

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Isabella has twice as much money invested at 4% as she has invested at 3%, and she has $500 more invested at 5% than she has at

adell [148]

Invested at 3% = x
invested at 4% = 2x
invested at 5% = x+500

0.03x + 0.04(2x) + 0.05(x+500) = 2025
0.03x + 0.08x +0.05x +25 = 2025
0.16x = 2000
x= 12,500
4% = 2x = 12,500 * 2 = $25,000

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2 years ago

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Answer
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Explanation

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2 years ago

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Which is the correct definition of a function

Dima020 [189]

Answer:

A function is a function that passes the vertical line test

Step-by-step explanation:

the vertical line test direction:

draw a line straight down you graph if it hits the x axis two time it not a function

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Multiplying a vector by a plain number is referred to as scalar multiplication.<br> True or false?

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Answer:

True

Step-by-step explanation:

In scalar multiplication, each component of the vector is multiplied by the scalar. The description is True.

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