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Svetradugi [14.3K]
4 years ago
13

Can someone please solve these?

Mathematics
1 answer:
serg [7]4 years ago
4 0

Answer:

Step-by-step explanation:

1) √2 + 2√2 =  ( 1 + 2 ) √2 = 3*√2   = 3√2

4) √8 + √2 = √2*2*2 + √2 = 2√2 + √2 = ( 2 +1 ) √2 = 3√2

7) 2√5 - √5 = (2 - 1)√5 = 1 √5

10 3√5 - 2√5 = (3 - 2) √5 = 1√5

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Solve 7x-2/4=3x+1 show clear algebraic workings
deff fn [24]

Answer:

x= 3/8 or 0.375

Step-by-step explanation:

Step 1: Simplify both sides of the equation.

7x+−12=3x+1

Step 2: Subtract 3x from both sides.

7x+−12−3x=3x+1−3x

4x+−12=1

Step 3: Add 1/2 to both sides.

4x+−12+12=1+12

4x=32

Step 4: Divide both sides by 4.

4x4=324

x=38

5 0
4 years ago
Kim and Sonia have each drawn a line on the scatter plot shown below: The graph shows numbers from 0 to 10 on x and y axes at in
alina1380 [7]

Answer:

B because it is closest to most data points

Step-by-step explanation:

i asked my teacher

7 0
4 years ago
Find the coefficient of x4 in the expansion (2x + 3)5.
VashaNatasha [74]

Answer:

10

Step-by-step explanation:

The expansion of this is 10x+15. So, the coefficient of x is 10 in this equation.

4 0
3 years ago
Which of these groups of relative frequencies would be best represented by a pie chart?
SVETLANKA909090 [29]

All of these would be perfectly fine represented by a pie chart except A, which doesn't add to 100%.

The question seems to be getting at the idea that a pie chart might be better when the slices are all visually different sizes. I don't really think that's right; a pie chart for D say, where the two slices are about the same, gives the correct impression of the relative frequencies, which are about the same.

Answer they're looking for: C

7 0
3 years ago
A text message plan costs $2 per month plus $0.23 per text. Fine the monthly cost for x text messages
vlabodo [156]

Answer:

y= 2 + 0.23x

Step-by-step explanation:

Giving the following information:

A text message plan costs $2 per month plus $0.23 per text.

<u>First, we need to structure the total cost formula:</u>

<u></u>

y= total cost

x= number of text messages

y= 2 + 0.23x

<u>Now, we can calculate the total cost for any number of text:</u>

x= 200

y= 2 + 0.23*200

y= $48

6 0
4 years ago
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