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Mashutka [201]
3 years ago
15

4. Solve the simultaneous equations x+2y=3 2x+3y = 5

Mathematics
2 answers:
musickatia [10]3 years ago
5 0
Okay

x+2y=3 - equation 1
2x+3y=5 -equation 2
Multiple equation 1 by 2
Giving you
2x+4y=6 - equation 3
Subtract equation 3 - equation 2
Giving you
Y=1
Put Y =1 into equation 1
Giving you
x+2(1)=3
x=3-2
x=1
gavmur [86]3 years ago
3 0

Step-by-step explanation:

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Triangle F G E is shown. Angle F E G is a right angle. The length of hypotenuse F G is 15.2 meters and the length of F E is 9 me
ololo11 [35]

Answer:

<h3>sin(x) = StartFraction 9 Over 15.2 EndFraction</h3>

Step-by-step explanation:

From the triangle given;

The length of hypotenuse FG =  15.2 meter

Since FE is the side facing the angle FGE, then;

the length of FE is opposite = 9 meters

m<FGE = x

According to SOH CAH TOA

sin theta = opp/hyp

sin m<FGE =  FE/FG

Substitute the given values

sin x = 9/15.2

Hence the correct answer is sin(x) = StartFraction 9 Over 15.2 EndFraction

3 0
2 years ago
Read 2 more answers
Solve these equations.<br> |x-7|=x-7
Cloud [144]

Answer:

x ≥ 7

Step-by-step explanation:

|x - 7| = x - 7

A. For each absolute, find the intervals

x - 7 ≥ 0     x - 7 < 0

     x ≥ 7           x < 7

If x ≥ 7, |x - 7| = x - 7 > 0.

If x < 7, |x - 7| = x - 7 < 0. No solution.

B. Solve for x < 7

Rewrite |x - 7| = x - 7 as

+(x - 7) = x - 7

      x - 7 = x - 7

-x + 14 = x

        14 = 2x

          x = 7

7 ≮7. No solution

C. Solve for x ≥ 7

Rewrite |x - 7| = x - 7 as

+(x - 7) = x - 7

      x - 7 = x - 7

True for all x.

D. Merge overlapping intervals

No solution or x ≥ 7

⇒ x ≥ 7

The diagram below shows that the graphs of y = |x - 7| (blue) and of y = x - 7 (dashed red) coincide only when x ≥ 7.

6 0
2 years ago
If two lines are perpendicular, then they form:
Alexandra [31]
A cross because they are intersecting each other at the center of each line.
7 0
3 years ago
Read 2 more answers
In a woodworking class, you need to make five triangles out of plywood. Each triangle has a height of 6 inches and a base of 14
vampirchik [111]
The area of a triangle can be calculated through the equation,
                            A = bh / 2
where A is area, b is base, and h is height. 
Substituting the known values from the given above to the equation
                            A = (14 in)(6 in) / 2 = 42 in²
Since, there are five of these triangles, the total area is,
                            total area = 5(42 in²) = 210 in²
Thus, the total area of the plywood needed is 210 in².
6 0
3 years ago
Read 2 more answers
Joey is 5 feet tall and casts a 45-foot shadow. A building casts a 270-foot shadow at the same time. How tall is the building?
Cerrena [4.2K]

Answer:

the building is thirty feet tall

Step-by-step explanation:

so make a ratio of shadow to joey

5:45

simplify that to

1:9

so you can now divide 270 by nine

30

the building is thirty feet tall

5 0
2 years ago
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