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Crazy boy [7]
2 years ago
13

HELP! WILL GIVE BRAINLEST!

Mathematics
1 answer:
ss7ja [257]2 years ago
7 0

Answer:

65.17°

Step-by-step explanation:

→ Inverse cosine -0.42

65.17°

→ As the domain is between 0 and 360, any negative values can be ignored

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Can someone help me with this
Andru [333]

Answer:

87, I'm pretty sure it's just 95-8. I might be wrong.

7 0
3 years ago
A water bill has increased by 25% to £52.50 work out the original cost?????
olga_2 [115]
100% - 25% = 75%

52.50 = 75% of what number?

52.50 = 0.75x

Let x = original cost

52.50 ÷ 0.75 = x

70 = x

The original cost was £70.
5 0
3 years ago
Which of the following is a solution of x2 + 5x = −2?
adoni [48]
X^2 + 5x = -2
x^2 + 5x + 2 = 0

x = -b (+-) sqrt (b^2 - 4ac) / 2a
a = 1, b = 5, and c = 2

x = -5 (+-) sqrt (5^2 - 4(1)(2)) / 2(1)
x = -5 (+-) sqrt (25 - 8) / 2
x = -5 (+-) sqrt (17) / 2

answer is : negative 5 plus or minus the square root of 17 divided by 2
4 0
3 years ago
Read 2 more answers
Which lists these numbers in order from least to greatest?<br> –22.7, 126, 3.28, –3.516, 43.9
avanturin [10]
-22.7, -3.516, 3.28, 43.9, 126
4 0
3 years ago
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2 A pharmacist has a 13 % alcohol solution and another 18 % alcohol solution. How much of each must he use to make 50 grams of a
nalin [4]
<h2>Therefore he took 40 gram of 1^{st} type solution and 10 gram of 2^{nd} type solution.</h2>

Step-by-step explanation:

Given that , A pharmacist 13% alcohol solution another 18% alcohol solution .

Let he took x gram solution of 1^{st} type solution

and he took (50-x) gram of 2^{nd} type solution.

Total  amount of alcohol =[x\times\frac{13}{100}] +[(50 -x) \times\frac{18}{100} ] gram

Total amount of solution = 50 gram

According to problem

⇔\frac{ [x\times\frac{13}{100}] +[(50 -x) \times\frac{18}{100} ]}{50}= \frac{14}{100}

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⇔- 5x= 700 - 900

⇔5x = 200

⇔x = 40 gram

Therefore he took 40 gram of 1^{st} type solution and (50 -40)gram = 10 gram of 2^{nd} type solution.

7 0
4 years ago
Read 2 more answers
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