Diego plans to save the same amount of money for 10 weeks. He wants to buy a new hammock for $65 and a sleeping bag for $105. how much money should he save each week to buy both items?

 17 per week

Step-by-step explanation:

10 weeks = 70 days

105 + 65 = 170

107 / 70 = 2.42857142857

2.42857142857 x 7 days = $17

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step-by-step explanation:

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x = ±sqrt(10)

step-by-step explanation:

5 - 2x² = -15

subtract 5 from each side

5-5 - 2x² = -15-5

-2x^2   = -20

divide by -2 on each side

-2x^2   /-2= -20/-2

x^2 =10

take the square root on each side

sqrt(x^2 )=±sqrt(10)

x = ±sqrt(10)

check:

5 - 2x² = -15

+sqrt(10)

5 - 2(sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

-sqrt(10)

5 - 2(-sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15