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Studentka2010 [4]
3 years ago
10

Easy maths ~ Expand and simplify these brackets branliest going and 20 points

Mathematics
2 answers:
jolli1 [7]3 years ago
4 0

Answer:

above is right

Step-by-step explanation:

MrMuchimi3 years ago
3 0

Answer:

a)

2(x+1) +3 (x+2)

2x +2 + 3x +6

5x + 8

b)

4(x+3) +2(x +7)

4x+12 + 2x +14

6x+26

c)

5(x+3) +2(x+7)

5x+15 +2x+14

7x +29

d)

8(x+10) +2(x+4)

8x+80 +2x+8

10x+88

Step-by-step explanation:

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Rasek [7]

Polygon Diagonals. The number of diagonals in a polygon = n(n-3)/2, where n is the number of polygon sides. For a convex n-sided polygon, there are n vertices, and from each vertex you can draw n-3 diagonals, so the total number of diagonals that can be drawn is n(n-3).

3 0
2 years ago
How Many Close Confidants Do People Have? In a recent study,1 2006 randomly selected US adults (age 18 or older) were asked to g
yaroslaw [1]

Answer:

0.08065

Step-by-step explanation:

Given that in a recent study,1 2006 randomly selected US adults (age 18 or older) were asked to give the number of people in the last six months with whom you discussed matters that are important to you.

If X is random variable then X has mean 2.2 and s = 1.4

n=2006

Std error of mean =\frac{1.4}{\sqrt{2006} } \\=0.03126

For 99% since sample size is large, t and z distn almost coincide.

Hence we can take 2.58 as critical value

Margin of error at 99% =2.58*0.03126\\=0.08065

7 0
3 years ago
2 equivalent rations for 6/5 ? please help !!!
quester [9]
Answer: 12/10 and 24/20
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7 0
2 years ago
Solve each quadratic equation by factoring: NEED THIS ASAP WILL GIVE BRAINLIEST
Nadusha1986 [10]

Answer:

9) x = 6,4

10) R = -3,-4

Step-by-step explanation:

Hope this helps dude

6 0
3 years ago
If the nominal interest rate is 6 percent and the rate of inflation is 10 percent, then the real interest rate is A. -16 percent
gladu [14]

Answer: C. -4 percent

Step-by-step explanation:

<u>Nominal interest rate</u> is the interest rate before taking inflation into account.

<u>Real interest rate</u> takes the inflation rate into account.

The equation that links all three values is

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3 0
3 years ago
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