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3 years ago

Please please please

Mathematics

2 answers:

Anna007 [38]3 years ago

8 0

15:7.5:30
This is because 15 is the smallest, which is half of 4(30). And right between 15 and 30 is 7.5.

Hope this helps

Evgen [1.6K]3 years ago

6 0

The perimeter is 67.5 inches

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I need help on number 30.

Naily [24]

Answer:

X=35

Step-by-step explanation:

Angle M= 60 <-- because we know a triangle=180 and so far we have 40 and 80 in the triangle JKM, 60 degrees is needed to complete 180

The other side of angle M (in the triangle KML)= 120 <-- because we know that a straight edge is 180 degrees and to complete the 180, we need another 120 degrees

so, to find X we need to find how many degrees are needed to complete the 180 degrees of triangle KML

120+25= 145

180-145= 35

6 0

4 years ago

Find the surface area of the regular pyramid

Fofino [41]

Answer:

I do not know, but I do know the formula.

The formula is: 12pl+B where p represents the perimeter of the base, l the slant height and B the area of the base.

3 0

3 years ago

Read 2 more answers

PolarNik [594]

Question 1:

5z – 9 = 36

5z = 45

z = $\frac{45}{5}$

z = 9

Hence, the answer is D.

Question 2:

5(2z + 4) = 0

10z + 20 = 0

10z = -20

z = $\frac{-20}{10}$

z = -2

Hence, the answer is A.

Question 3:

4a + 3(a + 1) = 24

4a + 3a + 3 = 24

7a = 21

a = $\frac{21}{7}$

a = 3

Hence, the answer is B.

Question 4:

3(4x + 5) = 12

12x + 15 = 12

12x = 12 - 15

12x = -3

x = $\frac{-3}{12} = - \frac{1}{4}$

Hence, the answer is A.

Question 5:

4x – 8 – 4x = 9

-8 ≠ 9

Hence, the answer is A.

8 0

4 years ago

Read 2 more answers

The manager of a night club in boston stated that 95% of the customers are between the ages of 21 and 27 years. if the age of cu

11111nata11111 [884]

95% of a normal distribution lies within ±1.96 standard deviations of the mean. That is, ±3 years represents ±1.96 standard deviations, so ...
.. the standard deviation is 3/1.96 = 1.53 years.

5 0

3 years ago

Please help don’t get it

Romashka-Z-Leto [24]

Answer:

Step-by-step explanation:

One complete turn is 1 perimeter (aka circumference).

We have to find the length it turned, hence, its circumference.

The formula for circumference (C) of a circle is:

$C=2\pi r$

Where r is the radius

The radius is HALF of diameter. Given diameter is 250, the radius is:

r = 250/2 = 125 feet

Now, substituting in formula we have:

$C=2\pi r\\C=2\pi (125)\\C=250\pi\\C=785.4$

So, it turned 785.4 feet with 1 rotation.

The correct answer is A

4 0

4 years ago