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kolbaska11 [484]
2 years ago
15

Solve quadratic equation by square roots method 2x^2-18=0

Mathematics
1 answer:
Brilliant_brown [7]2 years ago
6 0

Answer:

x = 3 and x = -3 (aka. x = ±3)

Step-by-step explanation:

2x² - 18 = 0

x² - 9 = 0

x² = 9

x = ±3

Therefore, x = 3 and x = -3

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Roscoe's family has a dinner at a restaurant. The total cost is $103.80. This includes 5% tax and 15% tip on the pre-tax amount.
Alla [95]
$83.04 is the total before tax and the tip
4 0
3 years ago
I am a multiple of 3 and 5. the sum of my digits is 9. what number am I?
iVinArrow [24]

Answer:

The answer is 45.

Step-by-step explanation:

This number is a multiple of 3 and 5, since it is divisible by both of these numbers.

4 + 5 equals 9, which is what it means by the sum of it's digits.

I hope this helps!

#teamtrees #WAP (Water And Plant)

3 0
3 years ago
When it comes to reducing that’s where I start having trouble for example 10/13x1/15= 10/65 but 10/65 not in lowest terms so I h
arlik [135]

Answer:

Step-by-step explanation:

Let's use your example as a starting point.  <em>Determine whether the same number will divide each 10 and 65 evenly</em>.  In this case, the answer is yes, and the number is 5.  10/5 = 2, and 65/5 = 13.  Thus, the fraction in lowest terms is 2/13.

6 0
3 years ago
In ΔVWX, \text{m}\angle V = (7x-1)^{\circ}m∠V=(7x−1) ∘ , \text{m}\angle W = (4x+16)^{\circ}m∠W=(4x+16) ∘ , and \text{m}\angle X
Anika [276]

Answer:

m∠X= 22°

Step-by-step explanation:

In ΔVWX:

m∠V=(7x−1) ∘

m∠W=(4x+16) ∘ ,

m∠X=(3x−17) ∘ . Find M∠X.

Step 1

We find the variable x

The sum of angles in a triangle is 180°

Hence,

ΔVWX = m∠V + m∠W +m∠X

180° = (7x - 1)° + (4x + 16)° + (3x - 17)°

180° = 7x - 1 + 4x + 16 + 3x - 17

180° = 7x + 4x + 3x - 1 + 16 - 17

180° = 14x -2

Collect like terms

180° + 2 = 14x

182° = 14x

x = 182°/14

x = 13°

Step 2

We find m∠X

m∠X = (3x−17) ∘

x = 13

m∠X = (3 × 13 − 17)°

m∠X = (39 − 17)°

m∠X = 22°

5 0
3 years ago
Simplify.
vichka [17]

Answer

your answer is not shown but the correct answer based on the top is going to be −

7.6x + 6.393

please check to ensure that you wrote the problem correctly as well as your answers.

Step-by-step explanation:

6 0
3 years ago
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