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pashok25 [27]
2 years ago
15

HELPPPPPPPPPP!!!!!!!!!!!!!

Mathematics
1 answer:
kondaur [170]2 years ago
5 0

A. true

B. false

C. false

D. false

hope it helps

have a good day :)

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What geometric figure has an order of rotational symmetry of 1
Ivanshal [37]

Arrow

You can not get the original arrow until you rotated the arrow 360 degrees.

5 0
3 years ago
If f(x) = 4x²-2 then f(-3) is​
Lilit [14]

Step-by-step explanation:

We are going to plug -3 into the equation of f(x) = 4x²-2.

f(-3) = 4(-3)²-2

f(-3)=36-2

f(-3)=34

The answer to this question is 34.

I hope this helps!! :)

7 0
2 years ago
Question 4
Irina-Kira [14]

Answer:

40

Step-by-step explanation:

3x^2 + 8x = 2

3x^2 + 8x - 2 = 0

D = b^2+4ac

D = 8^2+4(3)(-2)

D = 64+(-24)

D = 64-24

D = 40

8 0
3 years ago
The ratio of blue tacks to red tacks on the bulletin board is 3 to 5. there are 50 red tacks. how many blue tacks are on the boa
natulia [17]
3:5=x:50

Therefore 5 ×x = 50

x = 10

Therefore 3 × 10 = 30

therefore 30 blue pens

proof = 30 blue + 50 red= 3+ 5

therefore 80 = 8x

8 0
4 years ago
Read 2 more answers
A data set has a mean of 112 and a standard deviation of 2.5.
Ahat [919]

Answer with explanation:

Mean of the data set\mu = 112

Standard Deviation of the data set\sigma =2.5

Since , 50% of data lies on both side of the mean.

 Z at 50% = 0.1915

Margin of error for this data set

       =Z_{50 \text{percent}}\times\frac{\sigma}{\sqrt{\mu}}\\\\=0.1915 \times \frac{2.5}{\sqrt{112}}\\\\=0.1915 \times \frac{2.5}{10.58}\\\\=0.1915 \times 0.2362\\\\=0.0452    

Margin of error=0.045(approx)

4 0
4 years ago
Read 2 more answers
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