Mathematics High School

Question 8
Find the surface area of the equilateral triangular pryamid.
15 cm
10 cm

Question 8Find The Surface Area Of The Equilateral Triangular Pryamid.15 Cm10 Cm

Answers

Answer 1

Answer:

268.3 cm³

Step-by-step explanation:

Surface area of triangular pyramid = Base Area + ½*(perimeter of base)(height of pyramid)

Base area = 43.3 cm²

Perimeter of base = 10 + 10 + 10 = 30 cm

Height of pyramid = 15 cm

Plug in the values

Surface area = 43.3 + ½(30)(15)

Surface area = 43.3 + 225

= 268.3 cm³

Related Questions

The cities of Raleigh, Durham, and Fuquay-Varina approximate a right triangle. The distance from Raleigh to Durham is 24 miles. The distance from Raleigh to Fuquay-Varina is 18 miles. What is the distance from Durham to Fuquay-Varina?

Answers

Answer:

The distance from Durham to Fuquay-Varina is 30 miles.

Step-by-step explanation:

Given that the cities of Raleigh, Durham, and Fuquay-Varina approximate a right triangle, and the distance from Raleigh to Durham is 24 miles, while the distance from Raleigh to Fuquay-Varina is 18 miles, to determine what is the distance from Durham to Fuquay-Varina, the following calculation must be performed, applying the Pythagorean theorem:

18 ^ 2 + 24 ^ 2 = X ^ 2

324 + 576 = X ^ 2

√ 900 = X

30 = X

Therefore, the distance from Durham to Fuquay-Varina is 30 miles.

Andrea uses 9.8 pints of white paint and blue paint to paint her bedroom walls. 1 4 of this amount is white paint, and the rest is blue paint. How many pints of blue paint did she use to paint her bedroom walls?

Answers

Answer:

7.35

Step-by-step explanation:

Andrea uses 9.8 pints of white and blue paints to paint her bedroom walls

1/4 of this amount is white paint

= 1/4 × 9.8

= 0.25×9.8

= 2.45

Therefore the amount of blue paint can be calculated as follows

9.8-2.45

= 7.35

Hence 7.35 are blue paint

select two ratios equivalent to 27 : 9

Answers

Answer: 3/1 and 9/3

Step-by-step explanation:

HELP
question and diagram is circled in picture
Arc PR = ___ degrees

Answers

180 because it is a half circle

If the discriminant of an equation is positive, which of the following is true of the equation
A it has one complex solution
B it has one real solution
C it had two real solutions
D it has two complex solutions

Answers

Answer:

C it has two real solutions

Step-by-step explanation:

If the discriminant of a quadratic equation is positive, it means that the graph intersects the x-axis, and hence produces two real solutions.  

If the discriminant is zero, then the graph is tangential to the x-axis, and there will be two real coincident solutions.  

If the discriminant is negative, then there are two complex solutions.

Answer:

C

Step-by-step explanation:

Part A: Mike wants to join a gym. He has to pay an initiation fee of $16 and equal monthly payments for the year. The most he wants to pay is $580 for the year for his gym membership. a.) Write an inequality that you can use to determine the most he would want to spend for his monthly payments.

Part B: Now use your inequality from 15a to determine how much Mike’s monthly gym payment can be if the most he wants to pay is $580 for the year for his gym membership..

Answers

Answer:

Part A: [tex]12x+16\leq 580[/tex]

Part B: $47 per month

Step-by-step explanation:

Part A: 12 months in a year. Pays x amount of $ per year, with an additional $16 initiation fee. He wants to spend less than $580 total a year. Thus, [tex]12x+16\leq 580[/tex].

Part B: Solve the inequality for x.

$580 - $16 = $564

x = $564/12 = $47

Hope this helps! :)

Anyone know this brainliest

Answers

Answer:

0

Step-by-step explanation:

You can use the law of cosines. The answer is 0.

Hope this Helps!

Please solve 6 - 3x = 14

Answers

Answer:

Step-by-step explanation:

Answer:

X= -8/3

Step-by-step explanation:

The two triangles are congruent. Find the unknown variables.

Answers

Answer:

Z=18

Y=110

X=27

Step-by-step explanation:

since they are congruent, the corresponding sides are the same

Find f(-5) if f(x) = x+ 11.
06
05
04

Answers

f(-5) is 6 if f(x)=x+11, just trying to answer in the question format.

What does 2x+1-3=0 means

Answers

Answer:

it means that 2x+1-3 will equal to 0

Step-by-step explanation:

your on a app for answers

In which choice is
not a function of x?
A(2, -3), (-2, 3), (3,-2), (3, 2)
B. (2, 3), (3, 4), (-4, 5), (-5, 6)
c. (3,-2), (3, 2), (3, 3), (2, 2)
D. (1, 1), (1, 2), (2, 3), (3, 4)

Answers

I think the answer is C

HELP ASAP

Find an expression which represents the sum of (6x - y) and (7x - 7y) in simplest terms.​

Answers

Answer:

6x-y+7x-7y

6x+7x-y-7y

13x-8y.

Customer- I recently saw an advertisement that said your company would give 5% discount to anyone who enrolls in your automatic payment plan, my monthly bill is $75 how much will I save if I enroll?

Answers

Answer: $3.75

Step-by-step explanation:

The amount that you would save is 5% of your monthly bill of $75.

This amount is:

= 75 * 5%

= $3.75

The total amount that you would pay is:

= 75 - 3.75

= $71.25

PLEASE HELP WILL GIVE BRAINLIEST!!!!!

On a given planet, the weight of an object varies directly with the mass of the object. Suppose that an object whose mass is 9kg weighs 63 N . Find the weight of an object whose mass is 5kg.

Answers

Answer:

35

Step-by-step explanation:

9Kg =63N

5Kg=X (Cross Multiple)

=X×9 =5×63

divide both sides by 9

X=5×63

---------

9

=35

Answer:

35 N

Step-by-step explanation:

let w = weight of object

and m = mass of object

w = mk   where k is the constant of proportion

63 = 9k

k = 7

So, w = 7m

w = 7(5) = 35 N

Find the measure of the indicated angle to the nearest degree.
37
20

Answers

Inverse sin 20/37
My calc is buggin so i cant do it

Answer:

the angle is a sin angle

so sin=opposite

adjacent

sin=20/37

sin=0.3420/0.6018

the answer is 0.5683

could somebody answer both?
1. Our new computer is 3 times faster than our old one. How fast is the new computer?
2.A geology kit costs $85. Sophia has $25 and plans to save $5 a week until she can pay for the kit. How many weeks will it take before she can buy the geology kit?

Answers

Answer:

1. 3x faster

2. 12 weeks

Step-by-step explanation:

(85-25)/5=12

please helppp

Solve with ratio sin(30) to solve the missing side length x. Round to the nearest tenth​

Answers

Answer: x=5

Explanation:
sin=opposite side/hypotenuse
The opposite side is x and the hypotenuse is 10.
So your equation is: sin(30)=x/10
In order to get x by it self times ten to each side of the equation.
10 x sin(30)= x
Put 10 x sin(30) into graphing calculator and make sure your calculator is set to degrees.
Your answer:
5= x

Work on paper:

Answer:

we have

sin30=perpendicular/hypotenuse

1/2=x/10

x=½×10=5

x=5

is your answer

What is the nearest ten for the point shown on the number line below?​

Answers

The answer is fourth

Answer:

the fourth

Step-by-step explanation:

Trey bought 3 and 3 fourths pounds of apples from the grocery store. Corinne bought 1 and 1 third pounds of grapes from the grocery store. How many more pounds of fruit did Trey buy

Answers

Answer: 2 5/12

Step-by-step explanation:

Trey bought 3¾ pounds of apples from the grocery store. Corinne bought 1⅓ pounds of grapes from the grocery store.

To know how many more pounds of fruit that Trey bought, we have to find the difference between the value given above and this will be:

= 3¾ - 1⅓

= 3 9/12 - 1 4/12

= 2 5/12

Trey bought 2 5/12 pounds more.

Find the perimeter of the triangle. Round your answer to the nearest
tenth. A(2,4) B(-1,-5) C(6,-3)*

Answers

Answer:

i think answer might be 15

I need help with circle similarity / scale factor. can someone please help me out?​

Answers

Answer:

A scale factor exists because any two circles are similar. You can use the radii to determine the scale factor.

Step-by-step explanation:

The ratio between the radii is 31 so the scale factor is 31=3. The circumference of the smaller circle is C=2π(1)=2π.

a triangle has a side length of 5.4 and 7 x x=​

Answers

Answer:

D. 8.8

Step-by-step explanation:

As the pythagorean theorem.

A² + B² = C²,

5.4 × 5.4 + 7 × 7 = C²,

29.16 + 49 = C²,

78.16 = C²,

8.8 ≈ C

1 ÷ 1/4 what does that equal
​

Answers

Answer:

4

Step-by-step explanation:

Answer:

4

Step-by-step explanation:

factor the following polynomial completely

4x^2-100

Answers

Answer:

4 [ ( x - 5) ( x + 5) ]

Step-by-step explanation:

4x²-100

4 (x²-25)

4 (x²-5²)

4 [( x - 5) ( x + 5)]

Quadrilaterals A and B are similar.
Find the values of the sides marked
x
,
y
:

Answers

Answer:

x = 17.5

y = 5

Step-by-step explanation:

Similar means that corresponding angles (same colors in this case) are the same. Rotate the 2nd figure on the right in your mind until the angle label colors fit the 1st figure, just so you can tell what's what. Then you can create ratios with corresponding sides that include only one of the unknowns. So 1st we use

x/7 = 15/6

x = 15/6 * 7

x = 17.5

and

y/12.5 = 6/15

y = 6/15 * 12.5

y = 5

find the surface area of a rectangular prism with dimensions 5 ft 6 ft 7 ft

Answers

Answer: 214 sq ft

Step-by-step explanation:

A=2(wl+hl+hw)=2·(6·5+7·5+7·6)=214

Answer:

214 ft

Step-by-step explanation:

hope this helps

please i’m trying to help my gf work i’m in 8th i’ll give you brainliest

Answers

Take a better pic and i will explain in comment

Answer:

here is ur answer.....

hope it helped u and ur gf......

Can anyone pls help me with this, I don't even know where to start? I can also give Brainliest

Answers

The interior angles of a parallelogram will always equal 360. The interior angles of a triangle are 180 if it is a equilateral triangle then the angles are 60 degrees each. You know 2 sides of parallelogram. The 100 degree and 90 degree. You can find the one opposing the x because it’s on a straight line and a straight line is 180 degrees if a triangle is 60 degree angle then the opposing angle to complete the straight line must be 180-60 so you get 120. You now know 3 sides. 120, 90 and 100
They should add up to be 360 so you can set up an equation like so
120+90+100+x=360
And x = 50

Answer:

x = 50°

Step-by-step explanation:

The triangle has 3 congruent sides and is therefore equilateral.

The 3 angles are then congruent, each 60°

The left angle in the quadrilateral is adjacent to 60° of the triangle

180° - 60° = 120° ← angle inside quadrilateral

The sum of the interior angles of a quadrilateral = 360°

Subtract the sum of the angles from 360° for x

x = 360° - (120 + 90 + 100)° = 360° - 310° = 50°

Which of the following Metric prefixes is largest?
O A. kilo
O B. mega
O c. deci
O D. giga

Answers

The largest is D. giga

Answer:

mega cause it is bigger than giga which is bigger than kilo

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