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makvit [3.9K]
2 years ago
14

30 is 120 percent of what number

Mathematics
1 answer:
12345 [234]2 years ago
6 0

Answer: The answer is 25

25*1.2=30

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From the beginning of the day the temperature rose 15° so that by 4 pm it was 87°. What was the temperature at the start of the
Stolb23 [73]

Answer:

72 degrees

Step-by-step explanation:

the temperature rose 15, and ended as 87, so the temp was 72 before it rose

6 0
2 years ago
Can someone help me with these questions??
Naddika [18.5K]
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What is the missing angle?
Zina [86]

Answer:

I believe its 57.

Step-by-step explanation:

180-66=57.

57+57+66=180

7 0
3 years ago
What are the x- and y-intercepts of the graph of y = x2 + 3x − 10? (1 point)
Lynna [10]

Answer:

x-intercepts: (2, 0) and (−5, 0)  

y-intercept: (0, −10)

Step-by-step explanation:

y = x^2 + 3x − 10

y-intercept when x = 0 so y = -10, so y-intercept : (0, -10))

x-intercept when y = 0 so

x^2 + 3x − 10 = 0

(x +5)(x - 2) = 0

x + 5 = 0; x = -5

x - 2 = 0; x = 2

So x-intercepts: (-5, 0) and (2,0)

7 0
2 years ago
Whats the answer & how do I solve it ?
Veseljchak [2.6K]

Answer:

Area of rectangle = 225/2 or 112.5

Step-by-step explanation:

Given,

Consider a rectangle ABCD.

Let AC be a diagonal of rectangle of length   = 15

In triangle  ABC.

Sin 45° =height/hypotenuse   {SinФ = height / hypotenuse}

Here, hypotenuse = diagonal of rectangle ( i.e AC = 15)

And height is AB

Therefore, sin 45° = AB/AC

or sin 45° = AB / 15

or 1/√2 = AB /15

AB = 15/√2

Similarly we can find Base (i.e BC) using cosine.

Cos 45° = Base/Hypotenuse

Cos 45° = BC / AC

or  1/√2 = BC/15

BC = 15/√2

Hence we got length of rectangle , AB= 15/√2

And width of rectangle , BC = 15/√2

Therefore, area of rectangle = Length × Width

Area of rectangle = 15/√2  ×   15/√2  = 225/2

Hence, area of rectangle = 225/2 = 112.5

6 0
3 years ago
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