How is this wrong? I cant find it out, google says it is -7 but why?

Mathematics

2 answers:

kobusy [5.1K]2 years ago

8 0

Answer:

I think its wrong because there is no ( ) around 2*9

hope this helped even a lil

den301095 [7]2 years ago

4 0

Answer:

He was supposed to add and subtract left to right but he added first

Step-by-step explanation:

If he would have added left ot right he would have ended up with -8+1=-7

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8x10^6 is how many time as great as 4x10^3

Nataly_w [17]

Answer:

2x10^3

Step-by-step explanation:

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7 0

2 years ago

Prove that the two circles shown below are similar.

s344n2d4d5 [400]

The circles B and D are similar since the radius of the former is as twice as the radius of the latter.

<h3>Are the two circles shown in the figure similar?</h3>

By geometry we know that circles are defined by only one characteristic: radius. If two circles are similar, then the radii must be <em>different</em>. After a quick look at the figure, we conclude that the radii are $r_{B} = 4$ and $r_{D} = 2$ . Hence, the circles B and D are similar since the radius of the former is as twice as the radius of the latter.