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ioda
3 years ago
14

Find fl-2) for the function f(x) = 312 - 2x + 7​

Mathematics
1 answer:
Karo-lina-s [1.5K]3 years ago
8 0

Answer:

<h2>323</h2>

Step-by-step explanation:

f(x) = 312 - 2x + 7​

then

f(-2) = 312 - 2(-2) + 7​

      = 312 + 4 + 7​

      = 323

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The triangles are congruent by SSS or HL. Triangle A B C is reflected across B C to form triangle A prime B C. Triangle A prime
Finger [1]

Answer:

  reflection, then rotation, then translation

Step-by-step explanation:

Read the problem statement. It tells you the sequence:

Triangle A B C is <em>reflected</em> across B C to form triangle A prime B C. Triangle A prime B C is <em>then rotated</em> about point A to form A prime B prime C prime. Triangle A prime B prime C prime is <em>then shifted to the right</em> to form A double-prime B double-prime C double-prime.

The transformations are ...

  reflection, then rotation, then translation

8 0
3 years ago
Read 2 more answers
The number of bags of mulch you need to cover a planting area varies jointly with the area to be mulched (a) in sq ft and the de
Lena [83]

Answer:

  22 2/9

Step-by-step explanation:

When z "varies jointly" with x and y, it can be described by the formula

   z = kxy

Here, we have bags of mulch (n) varying jointly with area (a) and depth (d), both in feet. The given information can let us find the value of k.

  n = kad

  10 = k·(120)(1/4)

  10/30 = k = 1/3 . . . . . divide by the coefficient of k

Now, we can fill in the other values of interest.

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  n = 22 2/9

You need 22 2/9 bags of mulch to cover 200 ft² to a depth of 4 inches.

_____

<em>Comment on the problem</em>

This problem requires the formula be written with both area and depth expressed in feet, yet it gives depth in inches. The formula can also be written using depth in inches. In that case, k = 1/36.

8 0
3 years ago
The scale on a map is 1cm=20miles.if two airports are 4cm apart on the map, what's the distance between the airports?
Stels [109]
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8 0
3 years ago
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kifflom [539]

Answer:

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Step-by-step explanation:

12x − 18y = 27  

4x − 6y = 10

Multiply the second equation by -3 so we can eliminate x

-3(4x − 6y) = 10*-3

-12x +18y = -30

Add the first equation to this new equation

12x − 18y = 27

-12x +18y = -30

------------------------

0 = -3

This is not a true equation, so there is no solution


7 0
3 years ago
Cathy bought 2 jars of sauce for $3, what is the constant of proportionality in this situation
Lady_Fox [76]
$1.50 per 1 jar of sauce I found this by dividing both values by 2.

Hope this helps :)
7 0
3 years ago
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