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Talja [164]
2 years ago
9

Write the equation for:

Mathematics
1 answer:
xenn [34]2 years ago
7 0

Answer:

\frac{1}{2} x +x = 2 (x-4)

Step-by-step explanation:

Suppose number is x

Following equation can be written from question statement

\frac{1}{2} x +x = 2 (x-4)

Simplifying it further

\frac{3}{2} x = 2x-8

\frac{3}{2} x -2x=-8

\frac{3x-4x}{2}= -8

-x= -16\\x=16

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What is 3x +99 2(8*3)= 135<br> what is x equal to?
Ivenika [448]

Answer: -4

Step-by-step explanation: I am guessing you meant ...99  + 2(8*3)...

3x + 99 + 2(8 x 3) = 135

3x + 99 + 2(24) = 135

3x + 99 +48 = 135

3x + 147 = 135

(3x + 147) - 147 = (135) - 147

3x = -12

(3x) ÷ 3 = (-12) ÷ 3

x = -4

3 0
3 years ago
Tesfa is x years old his father is 4 times as old as tesfa his mother is 7 years younger than his father If their ages add up to
Sergio039 [100]

Step-by-step explanation:

his father's age= 4x

his mother's age= 4x- 7

his age= x

x+4x+4x-7=101

x+ 4x+ 4x= 101+ 7

9x= 108

\frac{9x}{9}= \frac{108}{9}

x= 12

Tesfa is 12 years old

4 0
3 years ago
Read 2 more answers
What is the slope of the line ?
N76 [4]

Answer:

Slope would be -1/3

Step-by-step explanation:

5 0
2 years ago
Prove that the roots of x2+(1-k)x+k-3=0 are real for all real values of k​
masha68 [24]

Answer:

Roots are not real

Step-by-step explanation:

To prove : The roots of x^2 +(1-k)x+k-3=0x

2

+(1−k)x+k−3=0 are real for all real values of k ?

Solution :

The roots are real when discriminant is greater than equal to zero.

i.e. b^2-4ac\geq 0b

2

−4ac≥0

The quadratic equation x^2 +(1-k)x+k-3=0x

2

+(1−k)x+k−3=0

Here, a=1, b=1-k and c=k-3

Substitute the values,

We find the discriminant,

D=(1-k)^2-4(1)(k-3)D=(1−k)

2

−4(1)(k−3)

D=1+k^2-2k-4k+12D=1+k

2

−2k−4k+12

D=k^2-6k+13D=k

2

−6k+13

D=(k-(3+2i))(k+(3+2i))D=(k−(3+2i))(k+(3+2i))

For roots to be real, D ≥ 0

But the roots are imaginary therefore the roots of the given equation are not real for any value of k.

6 0
2 years ago
A tortoise is walking in the dersert. It walks for 4 minutes at a speed of 6.4 meters per minute. For how many meters does it wa
exis [7]

Answer:

25.6 meters

Step-by-step explanation:

4 minutes times 6.4 meters

4 • 6.4= 25.6

3 0
3 years ago
Read 2 more answers
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