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Dennis_Churaev [7]
4 years ago
6

Please help! Will mark as brainliest

Mathematics
1 answer:
almond37 [142]4 years ago
7 0

Answer:

A: Not exactly sure, because an equilateral triangle is also an isosceles triangle.

B: No, a rhombus has 4 sides.

C: Yes

D: Yes

Step-by-step explanation:

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Please help Explanation will be appreciated thanks,
Genrish500 [490]

Answer: A; 6.3%

Step-by-step explanation:

Problem 1

For the first problem, we first want to find y so that we can plug it into the expression.

We can use elimination method for the system of equations to solve.

3x+3y=21

3x-y=5

We subtract both equations to eliminate x.

4y=16                                        [divide both sides by 4]

y=4

Now that we know y, we can plug it into the expression.

\frac{4}{2} -3                                         [divide]

2-3                                         [subtract]

-1

We know that the answer is A.

--------------------------------------------------------------------------------------------------------

Problem 2

For the second problem, we need to know how to calculate percent error. The formula for precent error is \frac{|measured-exact|}{exact} *100%. We know that the exact value is 80 because the buyer was supposed to given 80. 75 is the measured value because that was what the buyer was given.

\frac{|75-80|}{80} *100%                               [subtract]

\frac{|-5|}{80} *100%                                   [solve absolue value]

\frac{5}{80} *100%                                     [divide]

0.0625*100%                               [multiply]

6.25

Since the problem said to round to one decimal place, we know that the answer is 6.3%.

4 0
3 years ago
I’m having trouble answering e,f, and g
kodGreya [7K]
What’s is it about can you tell me.?
4 0
4 years ago
Read 2 more answers
How do you simplify (-1 - 3 √(3) × (-1 - 3 √(3)
harina [27]

Answer:

4 + 6√(3)

Step-by-step explanation:

Two right parentheses seem to be missing here.  I think you meant:

(-1 - 3 √(3) ) × (-1 - 3 √(3) )

and this is the square of a binomial.  The resulting square is:

1 + 6√3 + 3, or 4 + 6√(3)

5 0
3 years ago
Ann and Zoe love ice cream with cherries on top. Ann put 4 cherries on hers. Ann had 2 fewer cherries
PIT_PIT [208]

Answer:

Zoe has 6 cherries

6 0
3 years ago
Read 2 more answers
The boys' soccer team is having a celebration at the end of the season.There are 8 boys on the team and they have ordered 7 pizz
Nesterboy [21]
Hello There!

It would be 7/8 of a pizza each.

Hope This Helps You!
Good Luck :) 

- Hannah ❤
8 0
3 years ago
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