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dimulka [17.4K]
2 years ago
15

Please help! will give brainliest!

Mathematics
1 answer:
sergeinik [125]2 years ago
7 0
Answer:

Arc PL = 62
Arc QPS = 258

Explanation:

17. 5x-19 = 2x+11

18.

16x - 28 = 180.
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Help me plz I need help
charle [14.2K]

Answer:

-0.48

Step-by-step explanation:

(-1.2)(0.4)

= - 0.48

5 0
2 years ago
Write 0.000000092 in scientific notation
Leya [2.2K]

9.2x10^-8

Move the decimal to the right 8 times. Since it is moved to the right, the exponent is negative.

3 0
3 years ago
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A study was designed to compare the attitudes of two groups of nursing students towards computers. Group 1 had previously taken
Leviafan [203]

Answer:

a. H0:μ1≥μ2

Ha:μ1<μ2

b. t=-3.076

c. Rejection region=[tcalculated<−1.717]

Reject H0

Step-by-step explanation:

a)

As the score for group 1 is lower than group 2,

Null hypothesis: H0:μ1≥μ2

Alternative hypothesis: H1:μ1<μ2

b) t test statistic for equal variances

t=(xbar1-xbar2)-(μ1-μ2)/sqrt[{1/n1+1/n2}*{((n1-1)s1²+(n2-1)s2²)/n1+n2-2}

t=63.3-70.2/sqrt[{1/11+1/13}*{((11-1)3.7²+(13-1)6.6²)/11+13-2}

t=-6.9/sqrt[{0.091+0.077}{136.9+522.72/22}]

t=-3.076

c. α=0.05, df=22

t(0.05,22)=-1.717

The rejection region is t calculated<t critical value

t<-1.717

We can see that the calculated value of t-statistic falls in rejection region and so we reject the null hypothesis at 5% significance level.

7 0
3 years ago
Eight rolls of paper towels cost $4.80. At the same unit rate, how much will six rolls of paper towels cost?
julia-pushkina [17]

Answer:

$28.80

Step-by-step explanation:

4.80 x 6 = 28.8

Hope this helped!

3 0
2 years ago
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Will be mark trusted
Tanya [424]

<em><u>Answer:</u></em>

<h2><em><u>A is the answer.</u></em></h2>

Step-by-step explanation:

The commutative property changes the numbers in the equation they give. This is very different from identity, distibutive(needs parenthesis), or associative properties.

7 0
3 years ago
Read 2 more answers
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