3 years ago

What is the solution to the equation 2(4-3x)+5(2x-3) = 20-5x? O X = -13 5 OX= 7 13 OX= 2 O x= 3

Mathematics

1 answer:

jasenka [17]3 years ago

6 0

Answer:

x = 3

Step-by-step explanation:

You might be interested in

What expression is equivalent to x2 - 49

melisa1 [442]

Answer:

x^2 - 49= (x+7) (x -7)

Step-by-step explanation:

7 0

3 years ago

Given the equations f(x) = x + 4 and d (x) = 2x + 5, find: f (1) + d (2)

Lina20 [59]

1 = x + 4
3 = x

2 = 2x + 5
3 = 2x
3/2= x

3 0

3 years ago

Rob is saving to buy a new MP3 player. For every $16 he earns babysitting, he saves $6. On Saturday, Rob earned $64 babysitting.

Gnesinka [82]

Answer:

$24

Step-by-step explanation:

64/16 = 4

4x6 = 24

3 0

3 years ago

The average grain of salt is 0.0003 meters wide. Rhinovirus, which causes the common cold, is 0.00000003 meters wide. How many t

algol [13]

Answer:

$1\times 10^4\ times$

Step-by-step explanation:

Given:

Width of average grain of salt is, $w=0.0003\ m$

Width of Rhinovirus is, $W=0.00000003\ m$

Now, expressing each width in scientific notation form, we get:

$w=0.0003\ m = 3\times 10^{-4}\ m\\\\W=0.00000003\ m = 3\times 10^{-8}\ m$

Now, in order to get how many times 'W' is wider than 'w', we divide the two widths. This gives,

$\frac{W}{w}=\frac{3\times 10^{-4}\ m}{3\times 10^{-8}\ m}\\\\\frac{W}{w}=1\times 10^{-4-(-8)}=1\times 10^{-4+8}=1\times 10^4\\\\\therefore W=1\times 10^4\times w$

Therefore, the grain of salt is $1\times 10^4\ times$ wider than Rhinovirus.

5 0

3 years ago

The sides of a rectangle are in the ratio 5 : 4. If the perimeter of the rectangle is 360 cm , find its area

djverab [1.8K]

Answer:

Step-by-step explanation:

let, the length is z

thus the ratio will be 5z : 4z

perimeter = 2 (a + b)

360 = 2 ( 5z + 4z )

180 = 9z

z = 20 cm

length = 100 cm and width = 80cm

area = length * width

area = 100*80

area = 8000cm²

4 0

2 years ago

What is the solution to the equation 2(4-3x)+5(2x-3) = 20-5x? O X = -13 5 OX= 7 13 OX= 2 O x= 3​

What is the solution to the equation 2(4-3x)+5(2x-3) = 20-5x? O X = -13 5 OX= 7 13 OX= 2 O x= 3