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krek1111 [17]
3 years ago
7

What's the best first step in solving-4 + 2/5 > 5/10

Mathematics
1 answer:
Artyom0805 [142]3 years ago
3 0

Answer:

B

Step-by-step explanation:

There are 2 operations happening on the left side to x.

1. x is being multiplied by -4.

2. 2/5 is being added to -4x.

If you had a number for x, and you wanted to evaluate the left side, first, you would multiply the value of x by -4. Then you would add 2/5.

To solve an equation or an inequality, you do the opposite operation in the opposite order.

Since the second operation was add 2/5, to solve, you start by doing the opposite of the second operation. That means you subtract 2/5 from both sides.

Answer: B

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What are the two missing sides of the triangle ??
igor_vitrenko [27]
Remark
It's a right triangle so the Pythagorean Theorem applies. All you have to do is put the right things in the right places of the formula.

Givens
a = x
b = x + 4
c = 20

Formula and Substitution.
a^2 + b^2 = c^2
x^2 + (x + 4)^2 = 20^2

Solution
x^2 + x^2 + 8x + 16 = 20 Collect the like terms on the left.
2x^2 + 8x + 16 = 20  Subtract 20 from both sides.
2x^2 + 8x + 16 - 20 = 0  
2x^2 + 8x - 4 = 0         Divide through by 2
x^2 + 4x - 2 = 0

Use the quadratic formula
a = 1
b = 4
c = - 2

\text{x = }\dfrac{ -b \pm \sqrt{b^{2} - 4ac } }{2a} 
 
\text{x = }\dfrac{ -4 \pm \sqrt{4^{2} + 4(1)(2) } }{2} 


From which x = (-4 +/- sqrt(24) ) / 2
x1 = (- 4 +/- sqrt(4*6) ) / 2
x1 = (- 4 +/- 2 sqrt(6) ) / 2
x1 = -2 + sqrt(6)
x2 = -2 - sqrt(6)  This is an extraneous root. No line can be minus.

x1 = + 0.4495
x2 = x + 4 = 4.4495
6 0
3 years ago
Melanie has 36 feet of fencing to create an outside yard for a dog can you help her create a rectangular yard that has the large
eduard

Answer:

What action finally led to the release of the Iranian-held American hostages?

influence of Iranian citizens

payment to the Iranian government

an attack by the United States and other nations

sanctions by the United States and other nations

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
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Alex777 [14]
Let's assume length of the room as y
so the width of the room = y - 5

Area
y * (y - 5) = 750
5 0
3 years ago
Read 2 more answers
What is the rule for the sequence 3, 6, 18, 72, 360...?
Naddik [55]
You need to multiply another number each time.
For Example:
3x2=6
6x3=18
18x4=72
72x5=360
360x6= 2,160

It's a pattern
7 0
3 years ago
What is the general term of this number pattern <br>20,50,70,..........​
qaws [65]

Answer:

every 30

Step-by-step explanation:

20,50,70,100,130,160,190

5 0
3 years ago
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