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Yakvenalex [24]
3 years ago
10

Tam giác ABCD có góc B = 65 Độ góc C = 115 Độ hỏi góc A bằng bao nhiêu độ

Mathematics
2 answers:
Black_prince [1.1K]3 years ago
7 0

Answer:

a

Step-by-step explanation:

kasi yun ang tama at

nain tindi han ko

defon3 years ago
4 0
A





pls give me brainliest!! <3 have a good day
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This figure is made up of two rectangular prisms.
Irina18 [472]

Answer:

1134 in³

Step-by-step explanation:

(21×7×2)+(12×10×7)

1134

5 0
3 years ago
Suppose that 17 inches of wire costs 51 cents. At the same rate, how much (in cents) will 43 inches of wire cost?
Pavel [41]
Do 43 divided by 17 then you will get 2.5294117647 and multiply it by 51 you will get 129 cents or $1.29
3 0
4 years ago
Find the line y=a+bx which best approximates the data points
Vika [28.1K]

Answer:

y = 11.84x - 32.71

Step-by-step explanation:

Here, the given data points,

(−3,−70),(−1,−42),(1,−21),(2,−9),(4,14),

Let x represents the input value and y represents the output value,

So, the table that represents the given situation is,

x         -3            -1             1             2             4

y       -70          -42         -21         -9             14

By the above table,

\sum x=3

\sum y=-128

\sum xy = 269

\sum x^2=31

\sum y^2 = 7382

Let the equation of the line is,

y = bx + a

Where,

a=\frac{\sum y \sum x^2 - \sum x\sum xy}{n(\sum x^2)-(sum x)^2}

b=\frac{n\sum xy - \sum x \sumy}{n(\sum x^2)-(\sum x)^2}

n = number of data points = 5,

By substituting the values we get,

a = - 32.70547945 ≈ - 32.71,

b = 11.84246575 ≈ 11.84,

Hence, the equation of line would be,

y = 11.84x - 32.71

8 0
3 years ago
Dr. Black is 6 feet tall and is standing 25 feet from a streetlamp. He estimates that the angle of elevation from his line of si
Setler [38]
Answer = 62 feet

Explanation is in attached picture.

6 0
3 years ago
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Evaluate 4-2f4−2f4, minus, 2, f when f=1f=1f, equals, 1.
forsale [732]

4 -2f4-2f4=?    -2(1)(4)-2(1)(4)= (-2)(4)-(2)(4)=  4-8=-4   I think that Is the answer I hope it is lol


3 0
3 years ago
Read 2 more answers
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