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NISA [10]
3 years ago
14

PLEASE PLEASE PLEASE HELP ME! BRAINLEST!

Mathematics
2 answers:
miss Akunina [59]3 years ago
6 0

a = 45°

hope this helps


nekit [7.7K]3 years ago
4 0
Hope this will helps you ....

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a motorboat travels 456 km in 8 hours going upstream and 783 km in 9 hours going downstream. what is the rate of the boat in sti
Galina-37 [17]
\begin{gathered} \text{Let;s assume the sp}e\text{d of boat in still water is x.} \\ And\text{ the spe}ed\text{ of stream is y.} \\ For\text{ upstream,} \\ (x-y)\times8=456 \\ x-y=57\ldots(1)_{} \\ (x+y)\times9=783 \\ x+y=87 \\ x=87-y\ldots(2) \\ \text{Now, substitute the value of x in the equation (1).} \\ 87-y-y=57 \\ -2y=57-87 \\ 2y=30 \\ y=15\text{ km/hours (rate of current)} \\ \text{Substitute the value of y in the equation (2).} \\ x=87-15 \\ x=72\text{ km/hours (boat in still water)} \end{gathered}

4 0
1 year ago
1) Mr. Rios bought a house in 1960 for $20,000. The value of the house increased by
lana [24]

Answer:

A = 20,000(1.05)^x

Step-by-step explanation:

To get the approximate value of the house after x years, we will use the compound interest formula

A  = P(1+r)^n

P is the principal = $20,000 (cost of house)

r is the rate = 5% = 0.05

x is the time

Substitute into the expressio

A = 20,000(1+0.05)^x

A = 20,000(1.05)^x

Hence the required expression is A = 20,000(1.05)^x

8 0
3 years ago
Is (5,6.5) a solution to y= -1/2x + 9?
Jlenok [28]
6.5 = - 1/2(5) + 9

6.5 = - 2.5 + 9 which is the same as 6.5 = 9 - 2.5

6.5 = 6.5

So yes, this ordered pair IS a solution. 
3 0
3 years ago
Christopher Columbus set sail from Spain in 1492. In what year did the Civil War end?
xxTIMURxx [149]

Answer:

May 9, 1865

Step-by-step explanation:

7 0
3 years ago
Hii! Can anyone please help me with this? I'm giving 30 points and BRAINLIEST!! TYSM. :D
jeyben [28]

Answer:

I added a picture, with the answers. I hope it’s good.

Step-by-step explanation:

3 0
3 years ago
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