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Nostrana [21]
3 years ago
7

Okay! Who Needs Points? Give Your Explanation!

Mathematics
1 answer:
valentinak56 [21]3 years ago
7 0
4x+<span><span>7x</span><span>(12)</span></span>+12=<span><span>1008−<span>4x</span></span>+<span>12

</span></span>88x+12=<span><span>−<span>4x</span></span>+<span>1020
</span></span><span><span><span><span>88x</span>+12</span>+<span>4x</span></span>=<span><span><span>−<span>4x</span></span>+1020</span>+<span>4x</span></span></span><span><span><span>92x</span>+12</span>=<span>1020
</span></span><span><span><span><span>92x</span>+12</span>−12</span>=<span>1020−12</span></span><span><span>92x</span>=<span>1008

</span></span><span><span>92x</span>92</span>‌=<span>‌<span>1008<span>92


</span></span></span>x=<span>‌<span>252/23</span></span>
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Giải pt lượng giác sau<br> Cos x = -√3/2
Marat540 [252]

Answer:

0

Step-by-step explanation:

Solution for cosx=-3/2 equation:

cos((3*pi)/5)*cos((3*pi)/20) = 0

(60*x^3)/(60*x^5) = 0

cos((3*pi)/5)*cos((3*pi)/20) = 0

cos((3*x)/5)*cos((3*x)/20) = 0

1.5/100 = 0

6 0
3 years ago
45+ 46+47+ 48+ ... 113 + 114Gauss approach
Doss [256]

Answer:

5565

Step-by-step explanation:

1+2+3+4...+113+114=\frac{114*115}{2} =6555

1+2+3+4 ... +43+44=\frac{44*45}{2} =990

Thus, 45+46+47+48...+113+114= 6555-990=5565

3 0
3 years ago
Solve the system of equations -5x – 2y = 13 and 3x-y = 12 by combining the equations
Ne4ueva [31]

Answer:

x=1 y =15

Step-by-step explanation:

hopefully correct

-5x-2y=13 (i)

3x-y=12

-y=12-3x

y=-12+3x (ii)

substitute ii into i

-5x-2(-12+3x)=13

-5x +24-6x=13

-11x=-11

x=1

substitute x into ii

y=-12+3(1)

y=15

.

. . x=1 and y =15

4 0
3 years ago
Can anybody help me please
GREYUIT [131]

Question 7: Option 1:  x = 33.5°

Question 8: Option 3: x = 14.0°

Step-by-step explanation:

<u>Question 7:</u>

In the given figure, the value of perpendicular and hypotenuse is given, so we have to use any trigonometric ratio to find the value of angle as the given triangle is a right-angled triangle

So,

Perpendicular = P = 32

Hypotenuse = H = 58

So,

sin\ x = \frac{P}{H}\\sin\ x = \frac{32}{58}\\sin\ x = 0.5517\\x = sin^{-1} ( 0.5517)\\x =33.48

Rounding off to nearest tenth

x = 33.5°

<u>Question 8:</u>

In the given figure, the value of Base and Perpendicular is given, we will use tangent trigonometric ratio to find the value of x

So,

Perpendicular = P = 5

Base = B = 20

So,

tan\ x = \frac{P}{B}\\tan\ x = \frac{5}{20}\\tan\ x = 0.25\\x = tan^{-1} (0.25)\\x = 14.036

Rounding off to nearest tenth

x = 14.0°

Keywords: Right-angled triangle, trigonometric ratios

Learn more about trigonometric ratios at:

  • brainly.com/question/909731
  • brainly.com/question/902892

#LearnwithBrainly

8 0
3 years ago
The value of √30 is between which two to numbers ?
Naddika [18.5K]
5 and 6, the value is about 5.48
8 0
4 years ago
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