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valentina_108 [34]
3 years ago
7

You spend $24 on school supplies. You purchase pencils for $1 each and pens for $2 each. You purchase a total of 20 pens and pen

cils. How many pencils did you purchase? How many pens did you purchase?
Mathematics
1 answer:
Phantasy [73]3 years ago
7 0
You purchased 4 pens and 16 pencils.
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Let f(x) = 2x + 2. Solve f−1(x) when x = 4.
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Use the Pythagorean theorem and the following diagram to help you find the area and perimeter of the following triangle. Please
Mekhanik [1.2K]

Answer:

Perimeter = 30

Area = 30

Step-by-step explanation:

(x+8)^2 -x^2 = 12^2

x^2 +16x +64 - x^2 = 144

16x+64=144

16x = 80

x = 5

Double check:

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Let m = X^2 + 3.
Tpy6a [65]

The Equation in terms of m, m^2+7m+10=0

What is substituting in the equation ?

substituting means changing or replacing the values in the given equation.

Calculation:

Given equation is (x^2+3)^2+7x^2+21=-10

            and m= X^2 + 3.

make the given equation in the form X^2 + 3,

             now,

                     (x^2+3)^2+7x^2+21=-10

                     (x^2+3)^2+7(x^2+3)=-10

             where,

                      X^2 + 3= m

              after putting the value or replacing the values

             we get, m^2+7m=-10

                      m^2+7m+10=0

          the above equation is in the form of "m".

The Equation in terms of m, m^2+7m+10=0

Leran more about substitution here:

brainly.com/question/24094293

#SPJ1

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93 is the right answer please mark me as brainlest

Step-by-step explanation:

I say the answer support. me mark me as brainlest

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