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2 years ago

Find the sum. Write the addition property you used. 28+29+42=

Mathematics

2 answers:

katen-ka-za [31]2 years ago

8 0

Answer:

Step-by-step explanation:

First your gonna brake up each number and seperate them for example

then your going to add up the ones side, 8,9,2, to get 19.

Then your going to add the tens side, 2,2,4, to get 8.

take the one from 19 and put it in the tens place to get 9 in the tens and 9 in the ones.

put 9 and 9 together to get 99.

Zolol [24]2 years ago

4 0

Step-by-step explanation:

28+29=57

57+42=99 so 99 should be your answer

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Factor the algebraic expression below in terms of a single trigonometric function. sin 2x + sin x - 2

Pie

Answer:

The factored form is (sin x +2)(sin x-1)

Step-by-step explanation:

We have been given the trigonometric function $\sin^2 x +\sinx-2$

We can factor this by AC method. In AC method we multiply the term a and c and then write the middle term b in such a way that the sum/difference is equal to the product 'ac'

Using the method, we can write sinx as 2sinx -sinx

$\sin^2 x +2\sinx-\sin x-2$

Now, we group the first two terms and the last two terms

$(\sin^2 x +2\sinx)+(-\sin x-2)$

Now, we take GCF from each group

$\sin x(\sin x +2)-1(\sin x+2)$

Factor out (sinx+2)

$(\sin x +2)(\sin x-1)$

Therefore, the factored form is (sin x +2)(sin x-1)

7 0

2 years ago

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The table represents a linear function.

Alona [7]

Answer: -6

See attached picture

6 0

2 years ago

Who ever gets it right first gets brainliest

sleet_krkn [62]

Answer: Playing chess with Katie cause who'd play chess by themself right?

Step-by-step explanation:

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2 years ago

Evaluate f(t)=-2t2+ 1 for f(-3).

podryga [215]

Answer:

Step-by-step explanation:

First, plug-in f(-3) into t in the function:

$f(-3)=-2(-3) +1$

Second, multiply -2 and -3 to get 6:

$f(-3)=-2(-3)+1$ ⇒ $f(-3)=6+1$

Third, add 6 and 1 to get your answer:

$f(-3)= 6+1$ ⇒ $f(-3)=7$

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2 years ago

I need to know how to find the mean for 77,82,87,85,32,78?

lys-0071 [83]

Answer:

73.5

Step-by-step explanation:

To find the mean, sum the data and divide by the amount of data

mean = $\frac{77+82+87+85+32+78}{6}$

= $\frac{441}{6}$ = 73.5

6 0

2 years ago

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