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2 years ago

What is the sine trig function

1 answer:

3 0

Answer: Sine, Cosine and Tangent (often shortened to sin, cos and tan) are each a ratio of sides of a right angled triangle:

Step-by-step explanation:

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a triceatops has to children. one is 3 times older than the other. Together, their age is 50 months how old are they?

Charra [1.4K]

To solve this problem, create two equations with x and y. The pieces of information that we know are that the first child is 3 times older than the second child. Therefore if we assign child #1 the variable of x and child #2 the variable of y, we could get the following equation:

3x = y

Now, we also know that together their ages equal 50 months. Therefore:

x + y = 50 (months)

So, using these two equations you can use either substitution or elimination to find the values of x and y. You would first need to rearrange the first equation to 3x - y = 0 (just moving the y to the other side).

Then, you could add the equations together as followed:

3x - y = 0
x + y = 50
___________
4x = 50
x = 12.5

And then fill that value in to one of the equations to find y.

3x = y
3(12.5) = y
y = 37.5

So, one child is 12.5 months old and the other is 37.5 months old!

5 0

3 years ago

N2+7n+15=5. What's the answer

Veseljchak [2.6K]

N=- 5 or n= -2

Hope this helps!

4 0

3 years ago

Read 2 more answers

if the population of a country increases by 35% every decade by what percentage does it increase by every year

VikaD [51]

Answer:

have a good day for you

7 0

3 years ago

An engineer is comparing voltages for two types of batteries (K and Q) using a sample of 37 type K batteries and a sample of 58

Olegator [25]

Answer:

Hypothesis Test states that we will accept null hypothesis.

Step-by-step explanation:

We are given that an engineer is comparing voltages for two types of batteries (K and Q).

where, $\mu_1$ = true mean voltage for type K batteries.

$\mu_2$ = true mean voltage for type Q batteries.

So, Null Hypothesis, $H_0$ : $\mu_1 = \mu_2$ {mean voltage for these two types of

batteries is same}

Alternate Hypothesis, $H_1$ : $\mu_1 \neq \mu_2$ {mean voltage for these two types of

batteries is different]

The test statistics we use here will be :

$\frac{(X_1bar-X_2bar) - (\mu_1 - \mu_2) }{s_p\sqrt{\frac{1}{n_1}+\frac{1}{n_2} } }$ follows $t_n__1 + n_2 -2$

where, $X_1bar$ = 8.54 and $X_2bar$ = 8.69

$s_1$ = 0.225 and $s_2$ = 0.725

$n_1$ = 37 and $n_2$ = 58

$s_p = \sqrt{\frac{(n_1-1)s_1^{2}+(n_2-1)s_2^{2} }{n_1+n_2-2} } = \sqrt{\frac{(37-1)0.225^{2}+(58-1)0.725^{2} }{37+58-2} }$ = 0.585 Here, we use t test statistics because we know nothing about population standard deviations.

Test statistics = $\frac{(8.54-8.69) - 0 }{0.585\sqrt{\frac{1}{37}+\frac{1}{58} } }$ follows $t_9_3$

= -1.219

At 0.1 or 10% level of significance t table gives a critical value between (-1.671,-1.658) to (1.671,1.658) at 93 degree of freedom. Since our test statistics is more than the critical table value of t as -1.219 > (-1.671,-1.658) so we have insufficient evidence to reject null hypothesis.

Therefore, we conclude that mean voltage for these two types of batteries is same.

6 0

3 years ago

Explain how to write an equival3nt expresion using the associative property 2+(11+y)

nignag [31]

Answer:

13 + y

Step-by-step explanation:

hope i helped :) !

brainliest pleaseee !!?

3 0

3 years ago