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3 years ago

a recipe for cake needs 2, cups of flour. You are making 12 of the recipe. How many cups of flour do you need? plz solve this

Mathematics

1 answer:

rodikova [14]3 years ago

7 0

Answer:

a recipe for cake needs 2, cups of flour. You are making 12 of the recipe. How many cups of flour do you need?

Answer is 12

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We are given all three angles here:

Angle A =68 degrees

Angle B =90 degrees

Angle C =22 degrees.

Now let us calculate :

sin (A) = sin (68) = 0.927

cos (B) = cos (90) = 0

sin (B) = sin (90) =1

cos (C) = cos (22) = 0.927

tan (C) = tan(22) =0.4040

So we can see that sin (A) and cos (C) are both equal to 0.927.

So cos (C) is the correct option.

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3 years ago

Hich of the following is a true statement about perpendicular lines?

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Solve by completing a square r^2-8r+9

Tanzania [10]

Solving $r^2-8r+9$ by completing a square gives $(r+4)^2-7$

Step-by-step explanation:

We need to solve the equation $r^2-8r+9$ by completing a square

The completing a square method requires: $a^2\pm 2ab +b^2=(a\pm b)^2$

Solving:

$r^2-8r+9\\=(r)^2-2(r)(?)+(?)^2+9$

We need to add and subtract (4)^2=16 to make the equation a complete square

$=(r)^2-2(r)(4)+(4)^2-(4)^2+9\\=(r)^2-2(r)(4)+(4)^2-16+9\\=(r)^2-2(r)(4)+(4)^2-7\\=(r+4)^2-7$

So, Solving $r^2-8r+9$ by completing a square gives $(r+4)^2-7$

Keywords: Solve by completing a square

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The greatest common factor is 8

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a recipe for cake needs 2, cups of flour. You are making 12 of the recipe. How many cups of flour do you need? plz solve this ​

a recipe for cake needs 2, cups of flour. You are making 12 of the recipe. How many cups of flour do you need? plz solve this