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MAVERICK [17]
3 years ago
9

Only number 7 please hurry

Mathematics
1 answer:
Stella [2.4K]3 years ago
4 0

Answer:

pretty sure its B and C

Step-by-step explanation:

because they have a common multiplier of 2.5 and are similar triangles

18 x 2.5 = 45

20 x 2.5 = 50

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Julie wanted to earn money to attend a basketball camp. She started with a gift of money from her grandparents and then saved $2
adoni [48]
The equation would be y = 25x + 50

In order to find this equation, we need to know how much the gift from her grandparents was. To do so, we have to find out how much she's saved from dog walking. 

Since she saves $25 a month for 7 months, we can find the total amount as:

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Then we can subtract that from the total she has saved to find the amount for the gift.

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Sandy had 219 football cards. She bought 57 more at a garage sale. How many did she have then?
8_murik_8 [283]
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(1 point) Newton's law of cooling states that the temperature of an object changes at a rate proportional to the difference betw
slavikrds [6]

Answer:

a. \frac{dT}{dt}=k(T-Tm); T(0)=190

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d. t=153.39838\\ minutos

Step-by-step explanation:

a. Newton's law of cooling states that the speed with which a body is cooled is proportional to the difference between its temperature and that of the medium in which it is found. Then, the initial value problem is given by:

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T(33)=122e^{33k}+68=180\\\\e^{33k}=\frac{112}{122}\\\\33k=Ln(\frac{112}{122})\\\\k=-0.00259

d.

150=122e^{-0.00259t}+68\\\\Ln(\frac{150-68}{122})=-0.00259t\\\\t=153.39838\\\\

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