HELP ASAP WILL GIVE BRAINLY


Exercises
Determine whether each solid is a polyhedron. Then identify the solid. If it is a polyhedron, name the bases, faces.
edges, and vertices.

Answer:

step by step as shown

Step-by-step explanation:

f(x) = x²-1

f(5) = 5² - 1 = 24

f⁻¹(x)

y = x²-1

x = y² - 1    swap x and y

y² = x+1   ... x+1 ≥ 0      x≥-1

y = √x+1

f⁻¹(x) = √x+1

f⁻¹(8) =√8+1 = √9 = 3

Answer:

4/75 or 0.05333

Step-by-step explanation:

3+4+2+6=15 elements

2/15= probability to choose a black

6/15 = probability to choose a yellow cube

Probability to choose a black AND (*) a yellow = 2/15*6/15=12/225=4/75 or 0.05333

Answer: The answer is -9

Step-by-step explanation:-8 - 1 = -9

Answer:

The first one is infinite and the second one is one solution

Answer:

350 m² = 70 m × breadth

Step-by-step explanation:

This will be 5m = breadth

Answer:

y = -2x/3 + 16/3

Step-by-step explanation:

Answer:yes

Step-by-step explanation:

Answer:

0 ; 1

Step-by-step explanation:

Given the dataset :

Stem _____ Leaf

1 _______ 0 0 2 2 4 5 5 5 6 7 8 8 9 9 9 9

2 _______0 0 0 3 3 4 5 8 8

3 _______0 0 1 1 3 4 5 5 5 6 6 6 6 7 7 8 8 8 9 9

4 _______ 1 2 2 3 3 3 5 5 6 6 7 8 8 9 9

The value 52 appears 0 times in the dataset

This is because the stem does not contain the digit 5.

The value 47 appears 1 time(s) in the data set ; stem of 4, leaf 7

Answer:

X=7

Step-by-step explanation:

-5×2+3x=11

(-5×2)+3x=11

-10+3x=11

3x=11+10

3x=21

x=21÷3

x=7

Answer:3x+y=-8

Step-by-step explanation: If you were to solve each equation by graph the slope would be negative 3

Answer:

The answer is B lol

Step-by-step explanation:

Answer:

A

Step-by-step explanation:

radius is half the diameter

to find out the circumference, you do diameter times pi.

if radius is 5, the diameter is 10.

10 inches is the answer.

A

Answer:

25.8

Step-by-step explanation:

pls mark this as brainliest! thx hope this helped. :)

Answer:

The answer would be 25.8 or you can do 258

Step-by-step explanation:

Answer:

x= 1.44

Step-by-step explanation:

I divided 1.2 cm by 0.96 to find the factor, which give me 1.25.

So I did 1.8 cm divided by 1.25 which give me the answer above.

Hope that helps.  

Answer:

Area of ΔXYZ = n(r * r) square units

Step-by-step explanation:

Sides of ΔABC are 30 units, 40 units and 60 units.

Corresponding sides of another triangle XYZ are r times as long as the sides of ΔABC.

Therefore, sides of ΔXYZ will be, 30r units, 40r units and 60r units.

Perimeter of the triangle XYZ = 30r + 40r + 60r

                                                   = 130r units

If the area of ΔABC = n square units

Then the ratio of the area of ΔXYZ and ΔABC = (Ratio of the sides of ΔXYZ and ΔABC)²

[tex]\frac{\text{Area of triangle XYZ}}{\text{Area of triangle ABC}}=(\frac{\text{Side length of XYZ}}{\text{Side length of triangle ABC}})^2[/tex]

[tex]\frac{\text{Area of triangle XYZ}}{n}=(r)^2[/tex]

Area of ΔXYZ = nr² ≈ n(r * r)

Therefore, Option (3) will be the answer.

The expression that gives the perimeter of ΔXYZ is: 130r

The area of ΔXYZ = nr²

If A and B, with sides a and b respectively, are similar figures, therefore: area of A/area of B = a²/b².

Thus;

Given that the sides of ΔABC, which are 30, 40 and 60, are r times the corresponding sides of ΔXYZ, the sides of XYZ would be:

30r, 40r, 60r.

Perimeter of ΔXYZ = 30r + 40r + 60r = 130r

Given that the area of ΔABC is n units², therefore:

(area of ΔABC)/(area of ΔXYZ) = (side of ΔABC)²/(side of ΔXYZ)²

(n)/(area of ΔXYZ) = (30)²/(30r)²

n/area of ΔXYZ = 1/r²

nr² = area of ΔXYZ

area of ΔXYZ = nr²

Therefore, the expression that gives the perimeter of ΔXYZ is: 130r

The area of ΔXYZ = nr²

Learn more about area of similar figures on:

https://brainly.com/question/26145340

Answer:

[tex]f(x)=2x^2+2x-4[/tex]

Step-by-step explanation:

I think its B. if im wrong, am soo sorry

Answer:

x = 13

Step-by-step explanation:

<CBE = 180 - x

<BEC = x

<BCE = 180 - 90 - 64 = 26

180 - 3x + x + 26 = 180

206 - 2x = 180

2x = 26

x = 13

Answer:

D will round to 18.96

Step-by-step explanation:

18.958, 5+ will get rounded higher so it turns to 18.96, hope this helps you!

Answer: B) 4.28

The 2 is in the tenths place, and 8 is to the right of it. The 8 is five or larger, so that means we bump the 2 up to 3. We erase the 8. So we go from 4.28 to 4.3; we have a 3 in the tenths place as instructed.

We can think of 4.3 as 4.30

Note how 4.28 is closer to 4.30, than it is to 4.20

Side notes:

Answer: Shop A

15% of 240 is 36 and 240-36 is 204 so shop B is more expensive.

The price of a telephone at shop A is less than the price of a telephone at shop B. Then the telephone is bought from shop A.

The quantity of anything is stated as though it were a fraction of a hundred. A quarter of 100 can be used to express the ratio. Per 100 is what the term percent signifies. The symbol ‘%’ is used to symbolize it.

The price of a telephone is $200 in shop A and $240 in shop B. If you get a 15% discount shop B.

The price of the telephone after the discount at shop B will be given as,

⇒ (1 - 0.15) x $240

⇒ 0.85 x $240

⇒ $204

The price of a telephone at shop A is less than the price of a telephone at shop B. Then the telephone is bought from shop A.

More about the percentage link is given below.

https://brainly.com/question/8011401

#SPJ2

Answer:

$250

Step-by-step explanation:

discounting 15 percent is the same as marking something for 85 percent. This is the same as multiplying by .85

set up equation and solve

.85x=212.50

x=250

Answer:

y=3/2x

Step-by-step explanation:

Just find a fraction that is greater than one, but less than two and plug it in right next to x. I chose 3/2, but you can choose anything else if you like.

The equation of a line that has a slope that is greater than 1

but less than 2 in slope-intercept form is y = (3/2)x + b.

We know lines have various types of equations, the general type is

Ax + By + c = 0, and equation of a line in slope-intercept form is y = mx + b.

Where slope = m and b = y-intercept.

the slope is the rate of change of the y-axis with respect to the x-axis and the y-intercept is the (0,b) where the line intersects the y-axis at x = 0.∴

Given a line has a slope of greater than 1 and less than two,

∴ We can take any value from 1.01 to 1.99, for our convenience let us take 1.5which is 3/2.

So, the equation of the line will be y = (3/2)x + b.

learn more about lines here :

https://brainly.com/question/14511992

#SPJ5

Answer:

y+3 = -2(x-4)

Step-by-step explanation:

The point slope form of a line is

(y-y1) = m(x-x1) where m is the slope and (x1,y1) is a point on the line

y- -3 = -2 (x-4)

y+3 = -2(x-4)

Answer:

it will take her 6/8 days

Step-by-step explanation:

just subtract 1/8 from 7/8

Answer:

6/8  (3/4 in simplest form)

Step-by-step explanation:

have a good day :)

Answer:

july

Step-by-step explanation:

id say its july but i cant see all the options so im not sure thats one of them!

Answer:

(1) The required ratio of spirit to varnish is 1:3.

(2) You need 80 ml of mineral spirit.

(3) The ratio of tapestries' heights to width is 3:2.

Step-by-step explanation:

(1) If you need to mix 25% mineral spirit to the varnish, then the solution would contain 25% mineral spirit and 75% varnish.

So, [tex]\frac{spirit}{varnish}=\frac{25}{75}[/tex]

                  [tex]=\frac{1}{3}[/tex]

Thus, The required ratio of spirit to varnish is 1:3.

(2) If you use 240ml of varnish, then this quantity is 75% of the total solution or ration of varnish to the total solution will be 3:4.

Let [tex]x[/tex] be the quantity of total solution.

Then, [tex]240:x=3:4[/tex].

⇒[tex]\frac{240}{x}=\frac{3}{4}[/tex]

⇒[tex]3x=240*4[/tex]

⇒[tex]x=\frac{240*4}{3}[/tex]

⇒[tex]x=320[/tex]

That is, total solution is 320 ml.

Now, Spirit = Total solution - Varnish

⇒Spirit = 320ml-240ml

⇒Spirit = 80ml

Hence, if you use 240 ml of varnish, you need 80 ml of mineral spirit.

(3) Robison's tapestries all measure 1.5m long and 1m wide. First, we express dimensions in whole numbers by multiplying them by 10.

Then, dimensions are 15m long and 10m wide.

Now, Height : Width = 15:10

⇒[tex]\frac{Height}{Width} =\frac{15}{10}[/tex]

⇒[tex]\frac{Height}{Width} =\frac{3}{2}[/tex]

Hence, the ratio of tapestries' heights to width is 3:2.

Answer: i think it may be a

Step-by-step explanation:

Answer:

282 miles

Step-by-step explanation:

47 x 6 = 282

Answer:

282 miles

Step-by-step explanation:

When the family goes to the museum, its 47 miles. When they come back, its another 47 miles. They did that three times, so multiply by 6.

46 x 6 = 282 miles.

Divide by two if you need just the one-way trip.