15 ! answer as soon as possiblegiven: ab = ac ah = ak m∠bak = m∠cah prove: m∠k = m∠h△bah≅△    by   

In △BAH and △CAK

AB = AC   (Given congruent sides of triangle)

m∠BAK = m∠CAH ( Given congruent angles)

AH = AK   (Given congruent sides of triangle)

Therefore, triangle △BAH congruent to triangle △CAK.

△BAH ≅ △CAK by (Side Angle Sngle or SAS triangle congruency postulate).

Therefore, m∠K = m∠H  (Congurent parts of the congruent triangles are congruent).

2

step-by-step explanation:

1+1=2

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