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Korvikt [17]
3 years ago
10

What are the solutions to 2x^2-4x-30=0

Mathematics
1 answer:
oksano4ka [1.4K]3 years ago
5 0

Answer:

ill try  2x2-4x-30=0  

Two solutions were found :

x = 5

x = -3

Step by step solution :

Step  1  :

Equation at the end of step  1  :

 (2x2 -  4x) -  30  = 0

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If 5 liters cost $2.50, then how much would it cost for 9 liters?
damaskus [11]

5:$2.50

9:?

divide 5 by both sides cause you wanna see how much is 1 liter so you can multiply that with 9.

5 divided by 5 is 1.

$2.50 divided by 5 is $0.50

1:$0.50

each liter costs  $0.50

Multiply $0.50 with 9 and that is $4.50

the answer is $4.50

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2 years ago
Need help simple explanation if possible
photoshop1234 [79]

Answer:

m < A = 60º

m < B = 30º

Step-by-step explanation:

The given sides on this triangle are: 6, 6\sqrt{3}, and 12

Any triangle with the angles of 30º - 60º - 90º always has side lengths in this proportion:

x, x\sqrt{3}, 2x

We can line this up with the given sides. If x is 6, then 2x would be 12.

x : x\sqrt{3} : 2x = 6 : 6\sqrt{3} : 12

Angle B is across from 6, the shortest side. That also means that it corresponds to x, or the smallest angle in the proportion, 30º.

m < B = 30º

Solving for < A:

Method 1) Sum of Angles in a Triangle

Since we already know that one angle is right and therefore 90º and m < B is 30º, we can subtract these from the total sum of angle measures in a triangle to get the last angle, < A.

180º - 90º - 30º = 60º

m < A = 60º

Method 2) Using the second part of the proportion

Since m < A is across from the second largest side, we know that it is equal to x\sqrt{3} (6\sqrt{3} in this question) or 60º in the angle proportion.

This means that m < A = 60º

Let me know if you have any questions!

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2 years ago
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The answer is D. 88=g/11

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