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BARSIC [14]
3 years ago
7

I really need help please

Mathematics
1 answer:
koban [17]3 years ago
5 0

Answer:

50°

Step-by-step explanation:

the angles should add up to 180. there is a 90° angle abd a 40° angle which adds up to 130. 180-130 gives you rour missing angle if 50°.

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Valerie wants to take out a discount loan of $569. The rate is 4.5% for 250 days. How much interest will she pay? (Be sure to ro
lina2011 [118]

The interest is computed from

... I = Prt

where P is the principal amount ($569), r is the rate (0.045) and t is the time in years (250/360).

... I = $569×0.045×250/360 ≈ $17.78

Please note that time is not rounded. Rather, the exact value (25/36) is used in the calculation. The only rounding of any number is done at the end, where the amount is rounded to the nearest cent. (Your text authors should know this.)

_____

If you follow the problem instructions (which Valerie's lender will <em>not</em> do), the interest is calculated as ...

... t = 250/360 = 0.6944444... ≈ 0.69 . . . . years

... I = $569×0.045×0.69 ≈ $17.67

_____

Note the rounding of intermediate numbers (time) introduces an error of about $0.11 in the answer.

8 0
3 years ago
Read 2 more answers
A function f is given by the formula f(x)=a⋅ekx for constants a and k. we also know that f(4)=12 and f(7)=5. find numerical valu
masha68 [24]

The given function is

f(x) = a e^{kx}

And it is given that f(4)=12

On using this information, we will get

12 = a e^{4k}

And the other point is f(7)=5

Using this point, we will get

5= ae^{7k}

Dividing both equations, we will get

\frac{12}{5} = e^{4k-7k}

Taking ln to both sides

ln( \frac{12}{5} ) = -3k

k = -0.29

Performing back substitution ,

12 = a e^{-0.29*4}&#10;\\&#10;a =38.28

3 0
4 years ago
Let X and Y be the following sets:
MA_775_DIABLO [31]

<u>Given</u>:

Let X and Y be two sets.

The two sets are given by X=\{5,10,15\} and Y=\{3,6,9,12,15\}

We need to determine the value of the set X \cup Y

<u>Value of the set </u>X \cup Y<u>:</u>

The value of the set X \cup Y is the set that contains all the elements that are at least in one of the two sets.

Hence, the union of the set X \cup Y is given by

X \cup Y=\{5,10,15\} \cup \{3,6,9,12,15\}

X \cup Y=\{5,10,15,3,6,9,12\}

Arranging in ascending order, we get;

X \cup Y=\{3,5,6,9,10,12,15\}

Thus, the union of the sets X and Y is X \cup Y=\{3,5,6,9,10,12,15\}

6 0
3 years ago
What type of number is -2343? Whole number , integer , rational or irrational . SELECT ALL THAT APPLY
spayn [35]

Integer

Rational

(its not a whole number. Whole numbers are 0 or positive.)

4 0
3 years ago
What is the slope of the equation y – 3 = –4(x – 5)?e of the equation y – 3 = –4(x – 5)?
Len [333]

Answer:

The slope of the equation y-3=-4(x-5) is -4.

Step-by-step explanation:

This equation is written in point-slope form: y-y₁=m(x-x₁), where "m" is the slope or the equations.  In the equation y-3=-4(x-5), the -4 stands in the "m", or slope, spot, so the sope of this equation is -4.

6 0
3 years ago
Read 2 more answers
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