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3 years ago

Vertical anglesIf the two angles are vertical angles, what is the value of x?

Mathematics

2 answers:

Simora [160]3 years ago

7 0

Answer:

x=17

Step-by-step explanation:

OK so you have 7x-9 and you know that equals 110 so you simply work it out.

7x-9 = 110

+9 +9

7x = 119

_________

7 7

x = 17

hope this helps!

neonofarm [45]3 years ago

4 0

Answer:

Step-by-step explanation:

Vertically opposite angles are equal

7x - 9 = 110

7x = 119

x = 17

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Which of the following numbers is located to the right of / on the number line?

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3 years ago

The length of a rectangle is 2 cm less than twice the width. The area of the rectangle is 112 cm2. Find the length and width of

ELEN [110]

Let breadth be x

Length=2x-2

We know

$\boxed{\sf Area=Length\times Breadth}$

$\\ \sf\longmapsto 112=x(2x-2)$

$\\ \sf\longmapsto 2x^2-2x-112=0$

$\\ \sf\longmapsto x=-7\:or\:x=8$

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$\\ \sf\longmapsto Length=2x-2=2(8)-2=16-2=14$

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4 years ago

if one glass contians 175ml of juice ,determine the maximum number of glasses that can be filled with 10litre

monitta

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3 years ago

It is known that a particular laboratory task takes the average person 2.5 seconds. A researcher was interested in whether older

Alchen [17]

Answer:

The decision rule is

Fail to reject the null hypothesis

The conclusion is

There is no sufficient evidence to conclude that older people are slower

Step-by-step explanation:

From the question we are told that

The average time taken is $\mu = 2.5 \ seconds$

The sample size is $n = 30$

The sample mean is $\= x = 2.7 \ seconds$

The standard deviation is $\sigma = 1.4 \ seconds$

The null hypothesis is $H_o: \mu = 2.5$

The alternative hypothesis is $H_a : \mu > 2.5 \ seconds$

Generally the test statistics is mathematically represented as

$z = \frac{\= x - \mu }{ \frac{\sigma }{ \sqrt{n} } }$

=> $z = \frac{ 2.7 -2.5 }{ \frac{1.4}{ \sqrt{30} } }$

=> $z = 0.7825$

From the z table the area under the normal curve to the right corresponding to 0.7825 is

$p-value = P(Z > 0.7825 ) = 0.21696$

So from the question we see that the $p-value > \alpha$ hence

The decision rule is

Fail to reject the null hypothesis

The conclusion is

There is no sufficient evidence to conclude that older people are slower

5 0

3 years ago

Vertical anglesIf the two angles are vertical angles, what is the value of x?​

Vertical anglesIf the two angles are vertical angles, what is the value of x?