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3 years ago

Give tha nswer marked X. give reasons for your answer .... please help me !!

Mathematics

2 answers:

Yuliya22 [10]3 years ago

4 0

What website ıs thıs

Semmy [17]3 years ago

3 0

Answer:

wdadadsad

Step-by-step explanation:

adadadwdw

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Y=-3x + 6 y=9 What is the solution to the system of equations

ASHA 777 [7]

Answer:

the answer is x=-1 and y=9. Hope this helps!

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3 years ago

In ΔJKL, the measure of ∠L=90°, KL = 22 feet, and JK = 54 feet. Find the measure of ∠J to the nearest degree.

nydimaria [60]

We have been given that in ΔJKL, the measure of ∠L=90°, KL = 22 feet, and JK = 54 feet. We are asked to find the measure of angle J to nearest degree.

First of all, we will draw a triangle as shown in the attachment.

We can see from our attachment that side KL is opposite side to angle J and side JK is hypotenuse of right triangle.

We know that sine relates opposite side of right triangle to hypotenuse.

$\text{sin}=\frac{\text{Opposite}}{\text{Hypotenuse}}$

$\text{sin}(\angle J)=\frac{22}{54}$

Using inverse sine or arcsin, we will get:

$\angle J=\text{sin}^{-1}(\frac{22}{54})$

$\angle J=24.042075905756^{\circ}$

Upon rounding to nearest degree, we will get:

$\angle J\approx 24^{\circ}$

Therefore, the measure of angle J is approximately 24 degrees.

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4 years ago

How to find coefficient of x²in 2+x²+c

Grace [21]

Answer:

1 is cofficient of X ²

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3 years ago

Find an equation for the line perpendicular to y=7x-9 that passes through the point (7,2).

Vesna [10]

Answer:

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3 years ago

Use the given degree of confidence and sample data to construct a confidence interval for the population proportion p.

serious [3.7K]

Answer:

d. 0.459 < p < 0.603

Step-by-step explanation:

We have to calculate a 90% confidence interval for the proportion.

The sample proportion is p=0.531.

$p=X/n=69/130=0.531$

The standard error of the proportion is:

$\sigma_p=\sqrt{\dfrac{p(1-p)}{n}}=\sqrt{\dfrac{0.531*0.469}{130}}\\\\\\ \sigma_p=\sqrt{0.001916}=0.044$

The critical z-value for a 90% confidence interval is z=1.645.

The margin of error (MOE) can be calculated as:

$MOE=z\cdot \sigma_p=1.645 \cdot 0.044=0.072$

Then, the lower and upper bounds of the confidence interval are:

$LL=p-z \cdot \sigma_p = 0.531-0.072=0.459\\\\UL=p+z \cdot \sigma_p = 0.531+0.072=0.603$

The 90% confidence interval for the population proportion is (0.459, 0.603).

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4 years ago