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Marizza181 [45]
3 years ago
15

Need help I'm lost and confused

Mathematics
2 answers:
Murljashka [212]3 years ago
8 0
The answer is 89. it's really not that hard.juat follow the steps
Maslowich3 years ago
4 0
64-8+ 12 ×2 +9

apply the rule of BODMAS
and
that means you have to solve bracket first,
then of (as in 1/2 if 12)
then division
then multiplication
and then addition,
and finally you can subtract

[BODMAS stands for bracket, of, division, multiplication, addition, subtraction]



Using BODMAS rule

64-8+ 12 ×2 +9
= 64 - 8 + 24 +9
= 97 - 8
= 89


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The line with equation −a+3b=0 coincides with the terminal side of an angle θ in standard position and sinθ<0 .
Anna11 [10]
If a is the variable of the horizontal axis, then you can solve for b to get the equation of the line in slope-intercept form in the a,b plane:

-a+3b=0\implies b=\dfrac a3

i.e. a line with slope \dfrac13 through the origin, which means it is contained in the first and third quadrants. Since the terminal side of \theta has a negative sine, the angle must lie in the third quadrant.

Because the slope of the line is \dfrac13, you can choose any length along the line to make up the hypotenuse of a right triangle with reference angle \theta. Any such right triangle will have \tan\theta=\dfrac13, regardless of whether the angle is the first or third quadrant. But since \theta is known to lie in the third quadrant, and so \sin\theta and \cos\theta are both negative, you have

\tan\theta=\dfrac{\sin\theta}{\cos\theta}=\dfrac13\implies \dfrac{\sin\theta}{\cos\theta}=\dfrac{-1}{-3}\implies \cos\theta=-3
6 0
3 years ago
Read 2 more answers
Classify the following functions as growth or decay: f(x) = 10 (6/7)^x, g(x)= 1/3e^x, h(x)=5e^-x, k(x)= -10(6/7)^x
Strike441 [17]

It is known that any exponential function with the form f(x)=a^x is an increasing function while a function of the form g(x)=a^(-x) is a decreasing function.

Furthermore, it a function h(x) is increasing, then the function -h(x) is decreasing. By analogy, if a function k(x) is decreasing, then -k(x) is increasing.

Now let's analyze the functions from the problem.

\text{ Let }f(x)=10\cdot(\frac{6}{7})^x

Since (6/7)^x is increasing and the multiplying factor of 10 is positive, then the function <em>f(x)</em> is also increasing.

Use these rules to find whether each function is increasing or decreasing.

Remember that increasing functions are used to represent growth while decreasing functions are used to represent decay.

8 0
1 year ago
The question is asked of the photo
aivan3 [116]
Pythagoras Theorem:
 \boxed { \boxed {a^2 + b^2 = c^2 \beta }}

Apply Pythagoras Theorem:

a² + 6² = 11²

a² = 11² - 6²

a²= 85

a = √85

a = 9.22 (nearest hundredth)

Answer: RT = 9.22 cm
3 0
3 years ago
3x is a ____ of 3x^2 - 6x^3.
Rufina [12.5K]

Answer:

\boxed{factor}

Step-by-step explanation:

<em>Hey there!</em>

3x * x = 3x^2

3x * 2x = 6x^3

So 3x is a factor of 3x^2 - 6x^3.

<em>Hope this helps :)</em>

7 0
3 years ago
The ages of three friends are consecutive integers. The sum of their ages is 45
Alborosie

45 = (x) + (x + 1) + (x + 2)

45 = 3x + 3

- 3

42 = 3x

/3

14 = x

45 = 14 + (14 + 1) + (14 + 2)

45 = 14 + 15 + 16

The ages of the 3 friends are 14, 15, and 16.

6 0
3 years ago
Read 2 more answers
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