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3 years ago

Evaluate the expression for the given value 11 + r r = 7

Mathematics

2 answers:

Cerrena [4.2K]3 years ago

6 0

$11+r =7$

r=-4

allsm [11]3 years ago

3 0

The truee of expression is -4

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A man invests a certain amount of money at 2% interest and $800 more than that amount in another account at 4% interest. At the

Alex777 [14]

112 dallors interest beca0.02x + 0.04(800) = 112 0.02x + 0.04(x + 800) = 112 0.04x + 0.02(x + 800) = 112 use

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3 years ago

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Find the inverse of the given function.

kodGreya [7K]

For this case we must find the inverse of the following function:

$f (x) = - \frac {1} {2} \sqrt {x + 3}$

We follow the steps below:

Replace f(x) with y:

$y = -\frac {1} {2} \sqrt {x + 3}$

We exchange the variables:

$x = - \frac {1} {2} \sqrt {y + 3}$

We solve for "y":

$- \frac {1} {2} \sqrt {y + 3} = x$

Multiply by -2 on both sides of the equation:

$\sqrt {y + 3} = - 2x$

We raise both sides of the equation to the square to eliminate the radical:

$(\sqrt {y + 3}) ^ 2 = (- 2x) ^ 2\\y + 3 = 4x ^ 2$

We subtract 3 from both sides of the equation:

$y = 4x ^ 2-3$

We change y by f ^ {- 1} (x):

$f ^ {- 1} (x) = 4x ^ 2-3$

Answer: $f ^ {- 1} (x) = 4x ^ 2-3$

7 0

3 years ago

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If g(x)=f(1/3x) which statement is true

uysha [10]

Answer:

the graph of g(x) is horizontally stretched by a factor of 3

Step-by-step explanation:

8 0

3 years ago

Help me with this please

Fantom [35]

7x + 13 = 4x + 11 + 2x + 19

7x + 13 = 6x + 30

X = 17

7(17) + 13 = 132

Angle 3 is 132 degrees

3 0

1 year ago

18/24 = b/12 <br><br> Solve the proportion:

Lemur [1.5K]

Answer:

b=9

Step-by-step explanation:

18/24=3/4

3/4=b/12

cross product

4*b=3*12

4b=36

b=36/4

b=9

3 0

3 years ago