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2 years ago

The measure of two complementary angles are in a ratio of 8:7 find the measure of the smaller angle

Mathematics

1 answer:

miss Akunina [59]2 years ago

5 0

The smaller one 42. 90×7=630 630÷15 =42

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If 7 key chains cost $55.65, then 12 key chains cost $

Nimfa-mama [501]

Divide $55.65 by 7 to get the cost of 1 key chain ($7.95). Then multiply the cost of 1 by 12 and get $95.40

3 0

3 years ago

Eli invested $ 330 $330 in an account in the year 1999, and the value has been growing exponentially at a constant rate. The val

Cloud [144]

Answer:

The value of the account in the year 2009 will be $682.

Step-by-step explanation:

The acount's balance, in t years after 1999, can be modeled by the following equation.

$A(t) = Pe^{rt}$

In which A(t) is the amount after t years, P is the initial money deposited, and r is the rate of interest.

$330 in an account in the year 1999

This means that $P = 330$

$590 in the year 2007

2007 is 8 years after 1999, so P(8) = 590.

We use this to find r.

$A(t) = Pe^{rt}$

$590 = 330e^{8r}$

$e^{8r} = \frac{590}{330}$

$e^{8r} = 1.79$

Applying ln to both sides:

$\ln{e^{8r}} = \ln{1.79}$

$8r = \ln{1.79}$

$r = \frac{\ln{1.79}}{8}$

$r = 0.0726$

Determine the value of the account, to the nearest dollar, in the year 2009.

2009 is 10 years after 1999, so this is A(10).

$A(t) = 330e^{0.0726t}$

$A(10) = 330e^{0.0726*10} = 682$

The value of the account in the year 2009 will be $682.

4 0

3 years ago

Pencils come in boxes of 10. How many boxes should Erika buy if she needs 127 pencils

vova2212 [387]

13 boxes can I get brainliest please ❤️

3 0

3 years ago

Read 2 more answers

What is the constant of variation, k,

ValentinkaMS [17]

The K-constant variation is the factor of the increase-decrease relationship between the x-variable and y-variable which can be stated as y=k*x or x=y/k. For example, if y variable equal 5 and the x variable equal 2 then the k-constant variation equal 2 (calculation y=k*x --> 5=2*2.5). This constant shows the relationship between the variables.

6 0

3 years ago

Read 2 more answers

. The angle measures of a triangle are shown in the diagram. What is the value of x?

vodka [1.7K]

Answer:

ok the second one the answer is 66

Step-by-step explanation:

we get that x=180/48/2=66 hope this helps I wanted to help you just for a thx

6 0

3 years ago