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Vadim26 [7]
3 years ago
6

15% of what number is 900?

Mathematics
2 answers:
MrRa [10]3 years ago
4 0

Answer:

135

Step-by-step explanation:

Ugo [173]3 years ago
3 0

Answer:

135

Step-by-step explanation:

15/100 × 900 = 15 × 9 = 135

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Substitution method need help for home work
Marizza181 [45]
-3y = x...so we sub in -3y for x in the other equation

-x + 7y = 70
-(-3y) + 7y = 70
3y + 7y = 70
10y = 70
y = 70/10
y = 7

so we sub in 7 for y in either of the original equations to find x
-3y = x
-3(7) = x
-21 = x

so ur solution is (-21,7)
6 0
3 years ago
If i have all the angles and one side can i find the other sides
harkovskaia [24]

Sure, that's what solving triangles is. Trigonometry has a short menu. Basically we choose between three formulas: Law of Sines, Law of Cosines, Sum of Triangle Angles

The Law of Sines has two sides and two opposite angles; given any three we can solve for the fourth.

The Law of Cosines has three sides and one angle; again given any three we solve for the remaining one.

The Sum of Triangle Angles says all three angles add to 180 degrees, so given two we can find the third.

Here we have all the angles and one side, that's Law of Sines to get the remaining sides.


6 0
3 years ago
If f(x)= x^2-2x+3, find the value of f (-2) and f(3)
AlexFokin [52]

Step-by-step explanation:

<em>Given </em>

<em>f(</em><em>x</em><em>)</em><em> </em><em>=</em><em> </em><em>x²</em><em> </em><em>-</em><em> </em><em>2x </em><em>+</em><em> </em><em>3</em>

<em>Now</em>

<em>f(</em><em>-</em><em>2</em><em>)</em><em> </em><em>=</em><em> </em><em>(</em><em>-</em><em>2</em><em>)</em><em>²</em><em> </em><em>-</em><em> </em><em>2</em><em> </em><em>*</em><em> </em><em>(</em><em> </em><em>-</em><em>2</em><em> </em><em>)</em><em> </em><em>+</em><em> </em><em>3</em>

<em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em>=</em><em> </em><em>4</em><em> </em><em>+</em><em> </em><em>4</em><em> </em><em>+</em><em> </em><em>3</em>

<em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em>=</em><em> </em><em>1</em><em>1</em>

<em>f(</em><em>3</em><em>)</em><em> </em><em>=</em><em> </em><em>3</em><em>²</em><em> </em><em>-</em><em> </em><em>2</em><em> </em><em>*</em><em> </em><em>3</em><em> </em><em>+</em><em> </em><em>3</em>

<em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em>=</em><em> </em><em>9</em><em> </em><em>-</em><em> </em><em>6</em><em> </em><em>+</em><em> </em><em>3</em>

<em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em>=</em><em> </em><em>1</em><em>2</em><em> </em><em>-</em><em> </em><em>6</em>

<em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em>=</em><em> </em><em>6</em>

<em>Hope </em><em>it </em><em>helps </em><em>:</em><em>)</em>

4 0
3 years ago
SOMEONE PLEASE HELP ME WITH THIS ILL GIVE YOU BRAINLY IF YOU GET IT RIGHT PLEASE !!!!
lana [24]
Show me the first parts of the question
5 0
3 years ago
The angle measurements in the diagram are represented by the following expressions
AURORKA [14]

Answer:

∠ B = 45°

Step-by-step explanation:

∠ A and ∠ Bare alternate exterior angles and are congruent , then

5x - 15 = 2x + 21 ( subtract 2x from both sides )

3x - 15 = 21 ( add 15 to both sides )

3x = 36 ( divide both sides by 3 )

x = 12

Then

∠ B = 2x + 21 = 2(12) + 21 = 24 + 21 = 45°

6 0
3 years ago
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