Can someone help me please

Answer:

224mm²

Step-by-step explanation:formula for area of triangle = base x height x 1/2

8x10 = 80     80 / 2 = 40       40 x 4 = 160      area for square =base x height

the pyramid is comprised of four triangles and one square, all we need is to find the individual surface areas of the shapes that compose the pyramid

Answer:

(a) see attached

(b) Surface area = 224 mm²

Step-by-step explanation:

A square based pyramid is made up of a square at the base and 4 congruent triangles as the sides which meet at one point.

Area of a triangle = 1/2 × base × height

⇒ area of one triangle = 1/2 × 8 × 10

                                     = 40 mm²

Area of a square = s² (where s is the side length)

⇒ area of base = 8²

                         = 64 mm²

Total surface area = 4 × area of one triangle + area of the base

                               = 4 × 40 + 64

                               = 224 mm²

Answer:

15 dollars

Step-by-step explanation:

they lost 20 but made 5 back from the "sale"

Answer:

1.75x

Step-by-step explanation:

Answer:

The other angle is 100

Step-by-step explanation:

A straight line is 180, and if one angle is 80, then 180-80=100, giving you your answer. ^^

Answer:

i think the answer will be 180-80?

Answer:

3345+120=3465

Step-by-step explanation:

Answer:

11.27

Step-by-step explanation:

If I understand you question right...

C = d x π

11.27 π = d x π

divide both sides by π

11.27 = d

Answer:

√61

Step-by-step explanation:

using Pythagorean theorem,

h²+b²=hy²

h²+b²=hy²4²+2²=hy²

h²+b²=hy²4²+2²=hy²16+4=20

h²+b²=hy²4²+2²=hy²16+4=20hy²=20

therefore in radical form, Hy=√20

with the same theorem;

h²= hy²-b²

b² is initially given as (√20)²

hy² is given as 9²

h²=9²-(√20)²

h²=81-20

h²=61

h=√61

Answer:

answer in picture

Step-by-step explanation:

Let a be the area of the triangle

Let b be the area of the parallelogram

[tex]a = \frac{16 \times 9}{2} = 72 \: cm {}^{2} [/tex]

[tex]b = 30h \: cm {}^{2} [/tex]

Given that b is 5 times larger than a

b=5a

[tex]30h = 5(72)[/tex]

[tex]h = \frac{360}{30} = 12 \: cm[/tex]

Answer:

Slope= -3

y-intercept= (0,2)

Step-by-step explanation:

Use the slope-intercept form to find the slope and y-intercept.

Answer:

4-c/3 is ans

Step-by-step explanation:

3x+c=4

3x=4-c

x=4-c/3

Answer:

Not a real thing

Step-by-step explanation:

Answer:

2*f

Step-by-step explanation:

because all the rest are negative

Answer:

by technicality, both a and c are correct

Step-by-step explanation:

a) 5.12 x 20 = 102.4

b) 10.95 x 9 = 98.55

c) 11.24 x 9 = 101.16

d) 12.18 x 8 = 97.44

Answer:

64 inches tall

Step-by-step explanation:

We know in 1 foot, there are 12 inches.

We can convert 5 1/3 feet to 16/3 feet.

To do this you convert 5 feet to 15/3 feet and add it to 1/3 feet.

So we now have 16/3 feet and we will multiply by 12  to find the number of inches she is.

16/3 * 12 = 64 inches tall

Answer:

64; 68; 78

Step-by-step explanation:

The diameter of a circle is the radius of the circle times two.

hope I helped you! :)

Answer: 174

Step-by-step explanation:

Let's define the notation:

U = units digit

T = tens digit

H = hundreds digit.

Where the number is HTU.

We know that:

T = U + 3

"UTH" - "HTU" = 297.

"TU" = "HTU"/2 - 13.

First, let's wrote this correctly, and make a system of equations:

T = U + 3.

U*100 + T*10 + H - H*100 - T*10 - U = (U - H)*99 = 297.

T*10 + U = (H*100 + T*10 + U)/2 - 13 = H*50 + T*5 + U*0.5 - 13

Then we have the system of equations:

T = U + 3.

(U - H)*99 = 297

T*10 + U = H*50 + T*5 + U*0.5 - 13.

First, we can replace the first equation into the third one, so now we have only two variables.

(U - H)*99 = 297

(U +3)*10 + U = H*50 + (U + 3)*5 + U*0.5 - 13.

Now we can isolate H in the first equation and get:

(U - H) = 297/99

H = -297/99 + U.

Now we can replace it into the other equation:

(U +3)*10 + U = (-297/99 + U)*50 + (U + 3)*5 + U*0.5 - 13.

Now let's solve this for U.

U*10 + 30 + U = U*50 -150 + 5*U + 15 + U*0.5 - 13

11*U + 30 = U*(50  + 5 + 0.5) - 148

30 +148 = U*(55.5 - 11) = U*44.5

U = 178/44.5 = 4.

Then using the previous equations:

T = U + 3 = 4 + 3 = 7

H = -3 + U = -3 + 4 = 1.

Then our number is:

174.

Answer:

Hello!!! Princess Sakura here ^^

Step-by-step explanation:

First you have to translate the words to numbers into an understandable equation like this...

[tex]2x+3x=3(x+5)[/tex]

Now we can solve for x...

[tex]2x+3x=3(x+5)\\2x+3x=3x+15\\5x=3x+15\\2x=15\\x=7.5[/tex]

So the number is 7.5

5/2 is the number if the sum of twice a number and three times a number is triple the quantity of five more than a number then the number.

A numerical expression is a mathematical statement written in the form of numbers and unknown variables. We can form numerical expressions from statements.

Given, The sum of twice a number and three times a number is triple the quantity of five more than a number.

Assuming the number has a unique multiple of x.

∴ 2x + 3x = (3x + 5).

2x = 5.

x = 5/2.

learn more about numerical expression here :

https://brainly.com/question/29199574

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Answer:

true

Step-by-step explanation:

The answer to the question is true

Answer:

Non-mutually exclusive

Step-by-step explanation:

both events can happen simultaneously... 3 is an odd number, events A and B  have a common outcome.

It would be mutually exclusive if event A was rolling a 4 and event B was rolling an odd number.

===================================================

Explanation:

Ask yourself "is it possible to get a 3 and an odd number at the same time?"

The answer is "yes, because 3 is an odd number"

This is why they are non-mutually exclusive.

Mutually exclusive events cannot happen at the same time. In terms of a venn diagram, mutually exclusive events would be represented by two circles that do not overlap. The overlapping region is where the two events happen at the same time. An example of mutually exclusive events would be flipping a single coin to land on heads and tails at the same time.

Answer:

i hope this helps "Elasticity is the ability of a material to return to its original shape after being stretched or compressed. When an elastic material is stretched or compressed, it exerts elastic force. This force increases the more the material is stretched or compressed."

Step-by-step explanation:

Answer:

x=13

Step-by-step explanation:

Answer:

Step-by-step explanation:

(11x-15)+(5x-13)=180

11x+5x=180+13+15

16x=208

x=13

Answer:

Step-by-step explanation:

see attached image

use Pythagorean to solve the other leg of a triangle

b = [tex]\sqrt{12^2 - 10^2}[/tex]

b = [tex]\sqrt{44}[/tex]

b = 6.6 units

Answer:

x is 9

Step-by-step explanation:

since they are vertical angles, they are congruent. We make an equation putting each one behind the equal sign (7x+3=10x-24) and we solve.

Using the Central Limit Theorem, considering the higher sample size, the sample of 75 students, with a mean of 22.5, is a better representation.

It states that, for a normally distributed random variable X, with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean [tex]\mu[/tex] and standard error [tex]s = \frac{\sigma}{\sqrt{n}}[/tex].

A higher sample size leads to a smaller standard error, hence the sample of 75 students, with a mean of 22.5, is a better representation.

More can be learned about the Central Limit Theorem at https://brainly.com/question/16695444

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Answer:

This is my answer:The second one is better. the entire drama club one was better because the sample is large enough .It also comes from a bigger and more varied group of students thus it is less likely to be biased.

Step-by-step explanation:

Edge test and I got it right :D

Answer:

Jade's work makes sense, Peter's does not.

Step-by-step explanation:

What's wrong with Peter's work:

Peter did not apply associative property correctly. You cannot change what is inside the parenthesis. He also shouldn't be using associative property to solve this equation because it just doesn't make sense!

Jade's work:

She applied distributive property correctly and multiplied each term in the parenthesis by 2. All of her processes are logical and make sense! I could go on, but everything is correct lol

Best of wishes mate!

Answer:

Jade because she followed the correct order of operations.

Step-by-step explanation:

Always remember your order of operations.

P - parentheses

E - exponents

M - multiplication

D - division

A - addition

S - subtraction

Please Excuse My Dear Aunt Sally is the common phrase used to remember though I find PEM-DAS just as easy to remember.

Answer:

19682

Step-by-step explanation:

3^9-2÷2

19683-2÷2

19683-1

19682

try this instead

Hey there!

3x - y / 2

= 3(9) - 2 / 2

= 27 - 2 / 2

= 25 / 2

= 12.5

≈ 12 1/2

Therefore, your answer is: 12.5

Good luck on your assignment & enjoy your day!

~Amphitrite1040:)