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Alexxandr [17]
3 years ago
13

1. Elena takes two triangles off of the left side and three

Mathematics
1 answer:
Anna11 [10]3 years ago
5 0

Answer:

Step-by-step explanation:

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Need help with 12&13 due in less than two hours help plssss
GalinKa [24]
12.) AM:MN is a 2:1 ratio. BN:AM is a 1:2 ratio. MN:AB is a 4:1 ratio.

13.) three equal parts: two-thirds m. five equal parts: four-fifths m.
8 0
3 years ago
Dan bikes 10 miles in 50 minutes.at this rate , how far can she bike in 90 minutes
jarptica [38.1K]

Answer:

Dana would go 18 miles in 90 minutes because she is going a mile for every five minutes, so if she bikes for another forty minutes she will have biked 8 miles. This means that you would multiply 8 miles (remember its a mile per 5 minutes) by five minutes and that would give you forty. Then just add that on to the 50 minutes she has already biked.

or do it this way

To get the answer you need to find out how many miles she bikes in 10minutes.

Divide 50minutes by 10 you get 5. Now you divide 10(miles) by 5 and you get 2. So it means that in 10minutes she bikes 2miles. Now you need to know how many miles she bikes in 90minutes so if she bikes 2 in 10 then because 90:10=9 you do 2*9=18. She can bike 18miles in 90minutes. :))

Step-by-step explanation:

if this was helpful mark me as brainless

6 0
3 years ago
Solve: 3x - 2x + 4 = 5x - 4x - 8<br> A)<br> 3<br> B)<br> 6<br> 9<br> -3<br> no solution
Jobisdone [24]

Answer:

no soution

Step-by-step explanation:

3x - 2x + 4 = 5x - 4x - 8

Combine like terms

x+4 = x-8

Subtract x from each side

x+4-x =x-x-8

4 = -8

This is never true so there is no solution

8 0
3 years ago
I NEED HELP WITH QUESTION PLEASE!!<br> What is the inverse of f(x)<br> (x) = (x-4)² for x ≥ 4?
goblinko [34]

Answer:

4th choice \bold{f^{-1}(x) = \sqrt{x} + 4}

Step-by-step explanation:

<u>Definition of the inverse of a function</u>

A function g is the inverse of a function f if whenever y=f(x) then x=g(y). In other words, applying f and then g is the same thing as doing nothing. We can write this in terms of the composition of f and g as g(f(x))=x. The domain of f becomes the range of g and the range of f becomes the domain of g

To solve for the inverse of the function f(x) =\left(x-4\right)^2

Let y=\left(x-4\right)^2

\mathrm{Replace}\:x\:\mathrm{with}\:y \text{ and replace }\:y\:\mathrm{with}\:x

x=\left(y-4\right)^2

Switch sides
\left(y-4\right)^2=x

Take square roots on both sides
y-4=\pm\sqrt{x}

Add 4 on both sides to solve for y

y = \pm\sqrt{x} + 4

We have two solutions

y=\sqrt{x}+4,\:y=-\sqrt{x}+4

To determine which one of these to be chosen not that in the given choices we can eliminate the first two since x cannot be negative

The third choice can also be eliminated since
-\sqrt{x} + 4 is a decreasing function for x \ge 0

So the last answer choice is correct and the inverse off(x) = (x-4)^2

is given by  f^{-1}(x) = \sqrt{x} + 4

Answer:4th choice \bold{f^{-1}(x) = \sqrt{x} + 4}

Note

Domain of  (x-4)² is [4, ∞) since x ≥ 4 and (x-4)²  cannot be negative

Range of (x-4)²  is [0,  ∞)

Domain of \sqrt{x}\:+\:4 is [0, ∞)

Range of \sqrt{x}\:+\:4 is [4, ∞)

so indeed the domain of (x-4)² has become the range of \sqrt{x}\:+\:4 and the range of (x-4)² has become the domain of \sqrt{x}\:+\:4

5 0
1 year ago
What is the surface area of the regular pyramid given below ?
Levart [38]

Answer:

Option C 207\ units^{2}

Step-by-step explanation:

we know that

the surface area of a pyramid is equal to

SA=B+LA

where

B is the area of the base

LA is the lateral area

The area of the base B is

B=9*9=81\ units^{2}

The lateral area is equal to

LA=4*(1/2)(9*7)=126\ units^{2}

the surface area is equal to

SA=81+126=207\ units^{2}

5 0
3 years ago
Read 2 more answers
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