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1 year ago

HELP DUE TOMORROW GUYS

Mathematics

1 answer:

kakasveta [241]1 year ago

6 0

Answer:

x = 15

Step-by-step explanation:

8x + 9 and 51 are same- side interior angles and sum to 180° , then

8x + 9 + 51 = 180

8x + 60 = 180 ( subtract 60 from both sides )

8x = 120 ( divide both sides by 8 )

x = 15

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5 divided by 5.2 = ?

Alenkasestr [34]

Answer:

0.96153846153

but it would make more sense in a lot of cases if it was 5.2/5

Step-by-step:

5 0

3 years ago

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A Ladder That Is 5 meters in length is resting on a branch of a tree and the base of the ladder is 3 meters from the tree on the

Stells [14]

Use the Pythagoras theorem:-

height = sqrt(5^2 - 3^2 ) = sqrt16 = 4 metres Answer.

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3 years ago

3y - 5x = 9<br> Y= -5/3x-12<br> Are the parallel

bija089 [108]

Answer:

Both lines are not parallel

Step-by-step explanation:

Given as :

Two lines equation are as :

3y - 5x = 9 And y = - $\frac{5}{3}$ x - 12

First line is now written in eq y = mx + c

Or, 3y = 5x + 9

Or, y = $\frac{5}{3}$ x + $\frac{9}{3}$

So, Slop of this line ( m 1 ) = $\frac{5}{3}$

slop of second line ( m 2) is $\frac{- 5}{3}$

∵ The slop of both lines are not equal , so the line are not parallel to each other .

Hence Both lines are not parallel Answer

6 0

3 years ago

The range of the function f(k) = k2 + 2k + 1 is {25, 64}. What is the function’s domain? {5, 8} {-5, -8} {3, 8} {4, 7} {4, 8}

Sergeu [11.5K]

I think the answer is {5,8}

4 0

3 years ago

A university with a high water bill is interested in estimating the mean amount of time that students spend in the shower each d

yuradex [85]

Answer:

a) lower limit = 4.295 minutes

b) upper limit = 6.365 minutes

Step-by-step explanation:

Confidence interval can be defined as a range of values so defined that there is a specified probability that the value of a parameter lies within it.

The confidence interval of a statistical data can be written as.

x+/-zr/√n

Given that;

Mean x = 5.33 minutes

Standard deviation r = 1.33 minutes

Number of samples n = 11

Confidence interval = 99%

z(at 99% confidence) = 2.58

Substituting the values we have;

5.33+/-2.58(1.33/√11)

5.33+/-2.58(0.401010088288)

5.33+/-1.0346060277

5.33+/-1.035

= ( 4.295, 6.365) minutes

Therefore at 99% confidence interval (lower, upper limit) = ( 4.295, 6.365) minutes

a) lower limit = 4.295 minutes

b) upper limit = 6.365 minutes

3 0

3 years ago