3 years ago

I really need help please.

Mathematics

1 answer:

Vanyuwa [196]3 years ago

7 0

Answer:

= 3sqrt(10)

Step-by-step explanation:

The distance between two points is found by

d =sqrt( x2-x1)^2 + (y2-y1)^2)

= sqrt( 0--9)^2 +(-7--4)^2)

= sqrt( (9)^2 + (-7+4)^2)

= sqrt(9^2 + (-3)^2)

= sqrt(81+9)

= sqrt(90)

We know that sqrt(ab) = sqrt(a) sqrt(b)

= sqrt(9) sqrt(10)

= 3sqrt(10)

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Correct answer get the BRAINLIEST ANSWER!

OLga [1]

Here is how I completed the problem:

I started by creating a ratio:

$\frac{x}{0.18} + \frac{360}{0.10} = \frac{x+360}{0.15}$

Where 'x' is the desired amount of the 18% solution of sulfuric acid.

From here, I solved for 'x':

 $\frac{0.10x}{0.018} + \frac{360(0.18)}{0.018} = \frac{x+360}{0.15}$
$\frac{0.10x}{0.018} + \frac{64.8}{0.018} = \frac{x+360}{0.15}$
$\frac{0.10x+64.8}{0.018} = \frac{x+360}{0.15}$
$0.15(0.10x+64.8) = 0.018(x+360)$
$0.015x+9.72 = 0.018x+6.48$
$0.003x = 3.24$
$x = 1080$

∴You will need to add 1080ml of 18% Sulfuric Acid in order to obtain a 15% solution.

8 0

3 years ago

NEED ASAP 1. Find the distance between (3√3, √11) and (−5√3, 5√11)

VLD [36.1K]

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