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blagie [28]
3 years ago
10

Can anyone help with this

Mathematics
1 answer:
mestny [16]3 years ago
3 0
The sum of the interior angles of a triangle is always 180 degrees.  Thus,
the sum of 31, x+4 and 3x+9 must be 180.

31 + x + 4 + 3x + 9 = 180,     or    44 + 4x = 180


While it's not necessary, y ou could reduce this equation before solving for x:

11 + x = 45.             Then x = 34 degrees.

The three angles are then:

31
34+4 = 38
3(34) + 9 = 111

Check:  show that 31+38+111 = 180 (degrees)
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(9x−2.25)=(1.6+9x)<br><br> help
mel-nik [20]
Begin solving like you normally would. Add 2.25 to both sides and subtract 9x from both sides to try getting all x values on one side. However, you will find that after subtracting 9x from both sides, all x values go away, and you end with -2.25=1.6. This is not true (-2.25 is not 1.6), so the answer is no solution. There is no value of x which satisfies that equation.
4 0
3 years ago
Lynn wants to multiply 44 × 305. She says that all she has to do is find 4×305 and then double that number.
Lubov Fominskaja [6]
Answer C is correct because 2×(4×305) is the same as (2×4)×305 and 2×4=8.
5 0
3 years ago
The perimeter of a rectangle is 50 centimeters. If the width of the rectangle is 9 centimeters
nordsb [41]

Answer:

Length = 17 cm

Width = 8 cm

Step-by-step explanation:

Let the length be x cm

Therefore, Width = (x - 9) cm

Perimeter of rectangle = 2(l +w)

50 = 2[x + (x - 9)]

50/2 = 2x - 9

25 = 2x - 9

25+ 9 = 2x

2x = 34

x = 34/2

x = 17 cm

x - 9 = 17 - 9 = 8 cm

Therefore,

Length = 17 cm

Width = 8 cm

Thus, the dimensions of the rectangle are 17 cm and 8 cm.

6 0
3 years ago
Subtract. Fill in the missing numbers, 14 - 8 = 8= _____ + ________ So, 14 - 8 = _______
Nata [24]

Answer:

the answer is 6.

Step-by-step explanation:

I think they want you to skip count down by 4 and there's your anwser.

Hope I helped.

SJ

4 0
3 years ago
What is the solution to the equation?
dem82 [27]

Answer:what equation

Step-by-step explanation:

8 0
4 years ago
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