An angle and it’s supplement are in a ratio of 7: 2 equation

Step-by-step explanation:

We know: Supplementary angles add up to 180°.

Let

α - a measure of a first angle,

(180° - α) - a measure of a second angle

The equation:

cross multiply

          use the distributive property

    add 2α to both sides

            divide both sides by 9

walter needs to make at least 5 more cookies but no more than 40. 5 ≤ x ≤ 40

step-by-step explanation:

20 ≤ x + 15 ≤ 55

subtract 15 from all parts

20-15 ≤ x + 15-15 ≤ 55-15

5 ≤ x ≤ 40

this means how many more cookies he has to make

walter needs to make at least 5 more cookies, but no more than 40 cookies; 5 ≤ x ≤ 40

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im not sure