2 years ago

Solve the system of equations using the elimination method 2x + 9y = -40

1 answer:

Ber [7]2 years ago

7 0

Wait like find the variables number ?

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Pavel [41]

2 4
3 4 4 5 9 10 10 8

3 0

3 years ago

Drupady [299]

Answer:

$\frac{-\sqrt{65} - 3 }{4}, \frac{\sqrt{65} + 3}{4}$

Step-by-step explanation:

Since we cannot factor the expression, we must use quadratic formula: $x = \frac{-b +/-\sqrt{b^2 - 4ac} }{2a}$

Plug in a for 2, b for 3, and c for -7 and you should find your roots.

5 0

2 years ago

DiKsa [7]

Perimeter is the border around something...you add all the sides. So you you'll add 5+5=10 , 8+8=16 , and then you add 10+16=26. The answer is 26.

4 0

2 years ago

Ivahew [28]

Answer:

24.61%

Step-by-step explanation:

The distance covered in first week = 195 miles

The distance covered in the second week = 243 miles

We need to find the percentage increase in distance. It can be calculated as follows :

$\%=\dfrac{243-195}{195}\times 100\\\\=24.61\%$

So, the increase in distance is equal to 24.61%.

4 0

2 years ago

Aleonysh [2.5K]

I think the area of this triangle is 27.1 square cm. Hope it help!

5 0

2 years ago