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3 years ago

Which expression has the same value as the one below? 13+ (-18)

Mathematics

2 answers:

Vladimir [108]3 years ago

4 0

Answer:

13 - 18

Step-by-step explanation:

1) Remove parentheses.

$13 - 18$

2) Simplify.

$- 5$

Therefor, the Option D has the same value as the equation. 

Soloha48 [4]3 years ago

3 0

Answer:

D. 13-18

Step-by-step explanation:

Because it is the correct answer

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Answer:

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Step-by-step explanation:

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3 years ago

The equation y =-x+4 is the boundary line for the inequality y<-x+4 which Sentence describes the graph of the inequality?

Jlenok [28]

The region shaded below a solid boundary line

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3 years ago

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shtirl [24]

1: (pi)5^2 = 78.54 then multiply that by 11 and you get 863.94
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3 years ago

The percentage of titanium in an alloy used in aerospace castings is measured in 51 randomly selected parts. The sample standard

luda_lava [24]

Answer: $0.3849$

Step-by-step explanation:

Given : sample size : n= 51

sample standard deviation : s= 0.46

Significance level : $\alpha=1-0.95=0.05$

Using chi-square distribution, the critical values will be :

$\chi^2_{\alpha/2, n-1}=\chi_{0.025,\ 50}=71.4202$

$\chi^2_{1-\alpha/2, n-1}=\chi_{0.975,\ 50}=32.3574$

Confidence interval for population standard deviation ( $\sigma$ ) :

$\sqrt{\dfrac{s^2(n-1)}{\chi^2_{\alpha/2}}}$

Substitute all the values , we get

$\sqrt{\dfrac{(0.46)^2(50)}{71.4202}}$

Hence, the 95% two-sided confidence interval for σ : $0.3849$

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3 years ago

Six years ago annabelle was twice as old as jason was. now, annabelle is four years older than jason. how old is jason now?

baherus [9]

Now: a=j+4
6 years ago: Anabelle: a-6; Jason: j-6

$a-6=2(j-6) \\ a=2j-12+6 \\ a=2j-6 \\ \\ j+4=2j-6 \\ 4+6=2j-j \\ j=10 \\ \\ a=2(10)-6 \\ a=14$

4 0

3 years ago