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Novosadov [1.4K]
2 years ago
10

I need working out and answers for the following:

Mathematics
1 answer:
LenaWriter [7]2 years ago
4 0
A. 4x - 3 = 2x + 7
4x - 2x = 7 + 3
2x = 10
x = 5

B. 2x + 6 = 7x - 14
2x - 7x = - 14 - 6
-5x = -20
x = 4

C. 2( x + 3) = x - 4
2x + 6 = x - 4
2x - x = -4 - 6
x = -10

D.4 ( 5x - 2) = 2( 9x + 3)
20x - 8 = 18x + 6
20x - 18x = 6 + 8
2x = 14
x = 7

E.4x - 1/2 = x - 7
4x - x = -7 + 1/2
3x = (-14 + 1)/2
3x = -13/2
x = -13/6

F. 3x + 2 = 2x + 13/3
3x - 2x = 13/3 - 2
x = (13 - 6)/3
x = 7/3


Hope This Helps You!
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HELP!!!! thank you in advance!!​
MakcuM [25]

Question writer: it's customary to keep the degree sign off of the variable names in trig.

sin y = s/8

tan y = s/t

tan y = sin y  /   cos y

cos y = sin y / tan y

cos y = (s/8) / (s/t) = (s/8) × (t/s) = t/8

Answer: cos y = t/8,  third choice

6 0
2 years ago
1.Parallelogram ACFD is split in two parts so that ABED and FEBC are congruent isosceles trapezoids. What are the measures of al
DiKsa [7]
Refer to the diagram shown below.

Because ACFD is a parallelogram, its opposite angles are equal. Therefore
x = m∠ACF = m∠BCF = 48°  
Similarly,
y = m∠CAD = m∠CFD 

The sum of the angles inside a parallelogram is 360°. Therefore
48° + x + y + y = 360°
Because x = 48°,
48° + 48° + 2y = 360°
2y = 360° - 96° = 264°
y = 132°

Because ABED and FEBC are congruent, therefore
y = m∠DAB = m∠CFE = 132°
x = m∠ADE = m∠FCB = 48°

Because FEBC is a parallelogram, the opposite angles are equal. Therefore
m∠CBE = m∠CFE = y = 132°
m∠BCF = m∠BEF = x = 48°

Answer:
The measures of all angles of trapezoid FEBC are
m∠BCF = 48°
m∠BEF = 48°
m∠CBE = 132°
m∠CFE = 132°

7 0
3 years ago
i need to find the area of a rectangle using the formula A=b*h the height is 810 cm the base is 10 meters...i know i need to con
leva [86]

Answer:

81000cm^{2}  or   8.1m^{2}

Step-by-step explanation:

1m = 100cm

10m = 1000cm

a= b*h

a= 1000cm * 810cm

= 810000cm^{2}

1m^{2} = 10000cm^{2}

810000cm^{2} = 8.1m^{2}

7 0
3 years ago
help finding the perimter of 78.4 inches whats the length of each side and show me how to work the promblem
LuckyWell [14K]
A square has four even sides and the perimeter is equal to the sum of all of the sides.
P=s+s+s+s=4s
So we can evaluate the equation for P and then solve for s.
78.4=4s \\  \frac{78.4}{4} =s \\ s=19.6in
6 0
3 years ago
14. A triangle ABC is drawn on a coordinate plane. Find the length of the side BC.
Sveta_85 [38]
My best guess would be A
3 0
3 years ago
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