All categories

3 years ago

Can someone please help me ashow your work please

Mathematics

2 answers:

sertanlavr [38]3 years ago

8 0

Answer:

x= 3

Step-by-step explanation:

19x-5=7+15x

19x-15x=7+5

4x=12

x=12/4

x=3

katovenus [111]3 years ago

5 0

Answer:

x = 3

Step-by-step explanation:

Given

19x - 5 = 7 + 15x ( subtract 15x from both sides )

4x - 5 = 7 ( add 5 to both sides )

4x = 12 ( divide both sides by 4 )

x = 3

As a check

Substitute x = 3 into the equation and if both sides are equal then it is the solution.

left side = (19 × 3) - 5 = 57 - 5 = 52

right side = 7 + (15 × 3) = 7 + 45 = 52

Hence x = 3 is the solution

You might be interested in

Solve x2 + 8x – 3 = 0 using the completing-the-square method.

Inessa [10]

The answer is the last one !

8 0

3 years ago

Solve for x.

olga nikolaevna [1]

Answer:

$\boxed{x=5},x=-9$

Step-by-step explanation:

To rid the denominators, multiply both sides by $(x-3)(x+1)$ .

We get:

$6(x+1)-12(x-3)=(x-3)(x+1)$

Simplifying, we have:

$6x+6-12x+36=x^2-3x+x-3,\\-6x+42=x^2-2x-3,\\x^2+4x-45=0$

Solving, we get:

$x^2+4x-45=0,\\(x-5)(x+9)=0,\\x=5,x=-9$

Therefore, the solution with the greatest value is $x=\boxed{5}$

8 0

3 years ago

Find the equation of a line that is perpendicular to 4y-3x=1 and passes through point (-7,0).

Mnenie [13.5K]

Answer:

-4/3x + -28/3

Step-by-step explanation:

First you rearrange 4y-3x=1

y= 3/4x +1/4

then you reciprocate and change the sign the slope since you are trying to find a line perpendicular to it.

Slope(m) =-4/3

then you use the formula <em>y-y1= m(x-x1)</em>

y-0= -4/3 (x--7)

y= -4/3 +-28/3

7 0

4 years ago

Evaluate the expression, if possible: √ 64

astraxan [27]

The square root of a number is the smallest (positive) number possible that when multiplied by it self equals the number in the square root.

The square root of 64 is 8 ( 8 x 8 = 64).

The answer is B.

7 0

4 years ago

A raindrops has a mass of 0.50g. how many moles of water does a raindrop contain

alina1380 [7]

So, here you have to look at the periodic table and see what the molar mass of each molecule composing the water compound $H_2 O$
its two hydrogen atom plus an oxygen molecule, making it about 18g per mol.

That said, looking at the mass, we have to ask ourselves, if a mol of water contains 18g of mass, how many moles do we have in 0.5g of water?
We just do a cross multiplication:
$\frac{(0.5)}{18} =0.027 mol$

7 0

4 years ago

Can someone please help me ashow your work please ​

Can someone please help me ashow your work please