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Olenka [21]
3 years ago
7

What does x stand for in 4+x=3x

Mathematics
1 answer:
Irina18 [472]3 years ago
7 0

x stands for a variable, in which the variable would be replaced by a number(s) that would make the equation true.

Hope this helps

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Given that ABCD is a rhombus, find the value of x.<br> (X+14)
Kay [80]

Answer:

option B. x=38^o

Step-by-step explanation:

we know that

1) The two diagonals of a rhombus are perpendicular

2) The sum of the interior angles in any triangle must be equal to 180 degrees

Let

O ----> the intersection point of the diagonals of the rhombus

In the right triangle OAD

x^o+(x+14)^o+90^o=180^o

solve for x

x^o+(x+14)^o=90^o

2x=90^o-14^o

2x=76^o

x=38^o

6 0
3 years ago
Hello I don’t understand question 9 a and b. Please show working out.<br> Thanks
brilliants [131]
A) I would make the positive integer x and then form an equation.

x + 30 = x^2 - 12
x + 42 = x^2
0 = x^2 - x - 42 this can be factorised
(x - 7) ( x + 6) Therefore x = 7 or x = -6

Since the question asks for a positive integer the answer is 7.

B) two positive numbers x and y.

X - y = 3
x^2 + y^2 = 117

Use these simultaneous equations to figure out each number.

Rearrange the first equation

x = y + 3

Then substitute it into the second equation.

(y+3)^2 + y^2 = 117
y^2 + 6y + 9 + y^2 = 117
2y^2 + 6y - 108 = 0
then factorise this.
(2y - 12) (y + 9)

This means that y = 6 or y = -9 but it’s 6 because that’s the only positive number.

Use y to find x

x = y + 3
x = 6 + 3
x = 9

So the answers are x = 9 and y = 6.
3 0
3 years ago
Hello help please i’ll mark brainliest!!!
Wittaler [7]

Answer:

The moon has moved past the full moon and is moving toward the third quarter.

Step-by-step explanation:

7 0
3 years ago
7. The dimensions of a lawn shaped like a trapezoid are given in meters.
Veronika [31]

Answer:D:102

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Without multiplying, circle whether eac less than, or equal to the whole numbe 4 X 국 greater than less than equal to
hichkok12 [17]

Given

1. 4 x 1/7

2. 12 x 2 5/6

procedure

4*\frac{1}{7}

1. The answer is 4 x 1/7 is less than 4

12*2\frac{5}{6}>12

2. The answer is 12 x 2 5/6 is greater than 12

7 0
1 year ago
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