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worty [1.4K]
3 years ago
6

Help me please!!!!! I don't know this :(

Mathematics
2 answers:
Vsevolod [243]3 years ago
8 0

Answer:

10 30

15 45

so the third one

Step-by-step explanation:

It being multiplied by 3

2x3=6

3x3=9

10x3=30

15x3=45

xenn [34]3 years ago
8 0

Answer:

a. 30 and b. 15

Step-by-step explanation:

What you do is multiply by 3 for a. For b, you were supposed to divide by 3.

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7 books with a cost of 28$ then a 2$ charge which will put him right at 30
6 0
3 years ago
The perimeter of the square below is 36. What is the length of the diagonal, x? A.6 B.9 C.62–√ D.92–√
siniylev [52]

Answer:

9\sqrt{2}

Step-by-step explanation: did it

4 0
3 years ago
A researcher is planning to compare the effects of two different types of lights on the growth of bean plants. She expects that
kicyunya [14]

Answer:

The sample size is  n  = 36

Step-by-step explanation:

From the question we are told that

   The sample standard deviation is  s =  1.5

  The mean difference of the two groups is  \=x _ 1 - \=x_2 =  1

   The standard error is  SE =  \frac{ \= x_1 - \= x_2}{4}

=>                                      SE =  \frac{1}{4}

Let assume that the confidence level is 95% hence the level of significance is  

   \alpha = (100-95)\%

=> \alpha = 0.05

So the critical value of  \frac{\alpha }{2} obtained from the normal distribution table is

     Z_{\frac{\alpha }{2} } = 1.96

Generally the margin of error is mathematically evaluated as

     E =  Z_{\frac{\alpha }{2} } * SE    

   E =  1.96 * \frac{1}{4}

    E = 0.49

Generally the sample size is mathematically represented as

  n =[ \frac{Z_{\frac{\alpha }{2}  * s^2}}{E}]^2

=> n  = [\frac{1.96 * 1.5}{0.49} ]^2

=> n  = 36

6 0
4 years ago
Pls help oooooooooooo
Digiron [165]

Answer:

110

Step-by-step explanation:

Suppose lines EH and BD are parallel:

Angle <GFE and angle <ABC are supplementary so their sum is equal to 180

2x + 10 + x  + 20 = 180 add like terms

3x + 30 = 180 subtract 30 from both sides

3x = 150 divide both sides by 3

x = 50

We are asked the value of <ACD

<ABD and <ACD are also supplementary so we can find the value od <ACD:

x + 20 + <ACD = 180 we know x = 50 so we can replace x with that

50 + 20 + <ACD = 180

70 + <ACD = 180 subtract 79 from both sides

<ACD = 110

3 0
2 years ago
A circle with circumference 8 has an arc with a 288 degree central angle
Lapatulllka [165]

Answer:

Step-by-step explanation:

l=8

\theta=288 \pi /180=72\pi /45=8\pi /5\\\theta=\frac{l}{r} \\r=\frac{l}{\theta}=8 \times 5/(8 \pi )=5/\pi \approx 1.59

3 0
3 years ago
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