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Vlad1618 [11]
3 years ago
13

Help me , I will mark first answer brainliest

Mathematics
2 answers:
lana [24]3 years ago
8 0

Answer:

x=6;    ∠b=68°

Step-by-step explanation:

8x+74+2x+56=190

10x+130=190

10x=60

x=6

2x+56

12+56

68

artcher [175]3 years ago
5 0
X=6 I think it’s the correct answer
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What is -7 to the second power
Paha777 [63]

Answer:

+49

Step-by-step explanation:

-7 x -7 = +49 because the negatives cancel out, resulting in a positive

8 0
3 years ago
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Find m3 if m5 = 38° and m6 = 62°.
geniusboy [140]
M5 minus M6 will get M1
So 62 - 38 = 24
24 x 3 = 72
So M3 is 72
5 0
3 years ago
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A right angle has an area of 13m*2. The dimensions of the triangle are increased by a scale factor of 3. What is the area of the
Alex_Xolod [135]

The answer is: 117m²

The explanation is shown below:

1. You have the following information given in the problem:

- The triangle has an area of 13 m².

- The dimensions of the triangle are increased by a scale factor of 3.

2. Therefore, to solve the exercise you must multiply the area by 3^{2}=9, as following:

A=(13m^{2})(9)\\A=117m^{2}

5 0
3 years ago
Researchers have noted a decline in cognitive functioning as people age (Bartus, 1990). However, the results from other research
kolbaska11 [484]

Complete Question

The complete question is shown on the first uploaded image

Answer:

a

Yes the researcher can  conclude that the supplement has a significant effect on cognitive skill

b

d =  0.5778

c

The result of this hypothesis test shows that there is sufficient evidence to  that the supplement had significant effect.The measure of effect size is  large due to the large value of Cohen's d (0.5778 > 0.30 )

Step-by-step explanation:

From the question we are told that

  The sample size is  n=16

    The sample mean is  M  =  50.2

    The standard deviation is \sigma  = 9

    The  population mean is  \mu =  45

     The level of significance is  \alpha =  0.05

The null hypothesis is H_o  \mu =45

The alternative hypothesis is H_a  \mu \ne 45

Generally the test statistics is mathematically represented as

          z =  \frac{M -  \mu}{\frac{\sigma}{\sqrt{n} } }

=>       z =  \frac{50.2 - 45}{\frac{9}{\sqrt{16} } }

=>       z =  2.31

Generally the p-value is mathematically represented as

     p-value  =  2 *  P(Z >  z )

      p-value  =  2 *  P(Z >  2.31 )

From the z-table  

      P(Z >  2.31 ) = 0.010444

=>     p-value  =  2 *  0.010444

=>     p-value  =  0.021

From the obtained values we see that p-value <  0.05

 Decision Rule

 Reject the null hypothesis

Conclusion

There is sufficient evidence to conclude that the supplement has a significant effect on the cognitive skill of elderly adults

Generally the Cohen's d for this study is mathematically represented as

    d =  \frac{M  -  \mu}{\sigma }

=>  d =  \frac{50.2 -45}{9 }

=>  d =  0.5778

3 0
3 years ago
Find the height h of the parallelogram.
dimaraw [331]

Answer:

1.125

Step-by-step explanation:

1. Area=2.7*1.5;

2. Area=h*3.6;

3. 2.7*1.5=3.6*h; ⇒ h=2.7*1.5/3.6=1.125 units

3 0
3 years ago
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