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777dan777 [17]
3 years ago
12

-5 + a =21 what’s A?

Mathematics
1 answer:
KonstantinChe [14]3 years ago
3 0

Answer:

A=21+5

A=26

Step-by-step explanation:

just shift 5 to right side

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Iron has a density of 7.9 g/cm³. Gold has a density of 19.3 g/cm³.
alexandr402 [8]
Density = m/v
3.86kg=3860g
d= 3860/200
= 19.3g/cm^3
therefore it is gold.
7 0
1 year ago
Write the equation of the line in slope- intercept and point-slope form.​
AnnZ [28]

Answer:

Step-by-step explanation:

As we move from the x-intercept (-2, 0) to the y-intercept (0, 4), x increases by 2 (this is the run) and y by 4 (this is the rise).  Thus, the slope of this line is

m = rise/run = 4/2 = 2.

Given the y-intercept (0, 4) and the slope (2), the slope-intercept form of the equation of this line is y = 2x + 4.

From this we get the point-slope form:

y = 2x + 4 becomes y - 4 = 2(x - 0), or just y - 4 = 2x.

3 0
2 years ago
Why is the ph of distilled water usually 7? how can you prevent this from happening?
Nimfa-mama [501]
The pH of distilled water is usually LESS THAN 7, because when it contacts air CO2 gas begins dissolving into the water.
3 0
3 years ago
Complete the square to transform the quadratic equation into the form (x – p)2 = q.
ryzh [129]

The transformed equation is:

(x-3)^2 = 23

Step-by-step explanation:

We have to convert the equation in the form

(x-p)^2 = q

Given equation is:

x^2-6x-8 = 6

Adding 8 on both sides

x^2-6x-8+8 = 6+8\\x^2-6x = 14

In the given equation

a = x

b= ?

So,

2.x.b = 6x\\b =\frac{6x}{2x}\\b = 3\\

So 3^2 will be added on both sides

(x)^2-6x+ (3) = 14+ (3)^2\\(x-3)^2 = 14+9\\(x-3)^2 = 23

Hence,

The transformed equation is:

(x-3)^2 = 23

Keywords: Quadratic equation, transformation

Learn more about quadratic equation at:

  • brainly.com/question/5248692
  • brainly.com/question/5223123

#LearnwithBrainly

7 0
3 years ago
!!!!pleaseee help!!!!!
Alex17521 [72]

Answer:

1st option is correct .........

5 0
2 years ago
Read 2 more answers
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