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charle [14.2K]
3 years ago
15

Y=2x+1 x−y=−3 ​ Is (2,5) a solution of the system?

Mathematics
1 answer:
GuDViN [60]3 years ago
8 0
Sorry i am not now sorry
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The area of a triangle is 1,440 cm2. The base of the triangle is 5 times the height. What is the height of the triangle? 12 cm 2
GarryVolchara [31]

The area of a triangle with base 'b' and height 'h' is given by the formula:

A = \frac{1}{2} bh

It is given that the area of a triangle is 1440 cm^2.

It is given that the base of the triangle is 5 times the height.

So, b=5 \times h = 5h

We have to determine the height of the triangle.

Since, A = \frac{1}{2}bh

1440 = \frac{1}{2}(5h)h

1440 = \frac{1}{2}(5h^2)

1440 \times 2 = 5h^2

2880= 5h^2

\frac{2880}{5}= h^2

h^2=576

So, h=\sqrt{576}

So, h = 24 cm

Therefore, the height of the triangle is 24 cm.

Option 2 is the correct answer.

6 0
3 years ago
Read 2 more answers
Describe how to use special product patterns to find 21^2
Alex777 [14]

Answer:

21 x 21 = 441

Step-by-step explanation:

Whenever there is an exponent that is the many times you multiply the base by itself to.

6 0
3 years ago
3x − x − 1 = 15<br> What is x
azamat

Answer: x=8

Step-by-step explanation:

Step 1: Simplify both sides of the equation.

3x−x−1=15

3x+−x+−1=15

(3x+−x)+(−1)=15(Combine Like Terms)

2x+−1=15

2x−1=15

Step 2: Add 1 to both sides.

2x−1+1=15+1

2x=16

Step 3: Divide both sides by 2.

2x /2 = 16 /2

x=8

4 0
3 years ago
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using compound interest, how long does it take to double a 1000 dollar investment that pays 6.5% annual interest, compounded mon
KonstantinChe [14]

Answer:

11 years approx

Step-by-step explanation:

Given data

P=$1000

A=2000

R=6.5%

T= ?

Calculate time, solve for t

t = ln(A/P) / r

substitute

t=ln(2000/1000)/0.065

t=ln(2)/0.065

t=0.693/0.065

t=10.66

Hence the time is 11 years approx

3 0
3 years ago
Solve for x using<br> cross multiplication.<br> x = <br> 3x<br> 4<br> 2x + 7<br> 5<br> x = [?]
Lena [83]

Answer:

1.8 + 0.75

Step-by-step explanation:

1.80

+0.75

= 2.55

I think. :)

3 0
3 years ago
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