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3 years ago

Please answer please so many points not hard

Mathematics

2 answers:

blondinia [14]3 years ago

8 0

Answer:

In Heather's solution to the problem, she wrote and solved an equation.

Her work is:

Step 1: 1.08(x +9.01 +0.98 +5.01) = 21.87

Solving like terms

1.08(x+15}=21.87

dividing both side by 1.08

we get

x+15=21.87/1.08

x+15=20.25

subtracting both side by 13.9198

x=20.25-15

x=5.25

According to correction

;

Option 1st

yes,it is correct

Vlad1618 [11]3 years ago

6 0

Answer:

option a is right.

Step-by-step explanation:

because u can also check by putting the value of x = 5.25 .it satisfies both sides.

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Answer:

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Step-by-step explanation:

(7x + 3) + (4x - 1) - (2x + 4)

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3 years ago

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ki77a [65]

Answer:

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Step-by-step explanation:

Notation

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$\mu$ population mean (variable of interest)

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n represent the sample size

ME = 4 the margin of error desired

Solution to the problem

When we create a confidence interval for the mean the margin of error is given by this formula:

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$n=(\frac{z_{\alpha/2} \sigma}{ME})^2$ (b)

The critical value for 96% of confidence interval now can be founded using the normal distribution. The significance is $\alpha=1-0.96 =0.04$ . And in excel we can use this formula to find it:"=-NORM.INV(0.02;0;1)", and we got $z_{\alpha/2}=2.054$ , replacing into formula (b) we got:

$n=(\frac{2.054(12)}{4})^2 =37.97 \approx 38$

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3 years ago

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Answer:

Step-by-step explanation:

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e) All triangles with two acute angles are may or may not have third angle as obtuse angle or 90° angle

f) none of the above

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3 years ago

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3 years ago

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gayaneshka [121]

Answer:

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Step-by-step explanation:

Given

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Required

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Write out the given expression;