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mafiozo [28]
3 years ago
8

Simplify the expression 8x² + x - 5 + (2x² - 9x + 13) *

Mathematics
1 answer:
Elena-2011 [213]3 years ago
7 0

Answer: 10x^2-8x+8

I have explained detaled answers below in the link.

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What is the exact value of sin 170⁰ cos 55⁰ + cos 170⁰ sin 55⁰?
Zarrin [17]

Answer:

c

Step-by-step explanation:

3 0
2 years ago
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How do you find the slope (m) and the y-intercept for (0,-4), (5,-4)?
navik [9.2K]

Answer:

In order to find the slope (m), and the y-intercept of this coordinate pair, you must complete rise over run.

This is represented by y2-y1, x2-x1. This can be represented like so:

-4-0 = -4

5--4 = 9

Here, we have concluded that our slope is -4/9.

Now, we must convert this into point slope form. Point slope form is y-y1=m(x-x1). This will look like this in our situation:

y+4=-4/9(x-0)

To solve, distribute the -4/9 first, which will leave you with:

y+4=-4/9x+0

Now, subract the 4 to both sides of the equation.

Our final answer looks like: y=-4/9-4.

<em>-</em>

<em>SLOPE: -4/9</em>

<em>Y INTERCEPT: -4 </em>


3 0
3 years ago
Find the total surface area of the net.​
Elanso [62]

Answer:

87.8 square meters

Step-by-step explanation:

First of all, find the area of the three recthangles.They are all 9m long and 3m wide. 9*3 is 27, and since there are three of them, 27*3 is 81.

To find the area of the two triangles, you could do 3*2.6. Normally, you would halve the values because they are triangles but since there's two of them it cancels out.

3*2.6 is 7.8, and adding that to the area of the rectangles gets the equation 81+7.8 which comes out to 87.8 square meters.

3 0
3 years ago
Every 7 years the Lancaster family has a family reunion. Every 6 years they update their family tree. If they both had a photo t
Nina [5.8K]

Answer:

In year 2039 both the events will happen again.                    

Step-by-step explanation:

We are given the following in the question:

Family reunion:

Every 7 year

Update the family tree:

Every 6 years

1997 was the year when they had a family reunion as well as they updated their family tree.

We have to find the year in which both the events will occur together.

We find the lowest common multiple of 7 and 6.

L.C.M(7,6) = 7\times 6 = 42

Thus, after 42 years both the event will happen again.

Year:

1997 + 42 = 2039

Thus, in year 2039 both the events will happen again.

3 0
3 years ago
wiwona purchused a set of vinage beads.There are 2,140 beads in the set.If she uses the beads to make bracelets that have 7 bead
S_A_V [24]
Wiwona can make 305 bracelets because if we divide 2140 divided by 7 is 305
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