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____ [38]
2 years ago
13

What is the value of x?

Mathematics
1 answer:
alekssr [168]2 years ago
4 0

Answer: 28

Step-by-step explanation:

Using the similarity rule we get the equation

(10+x)/(15+42) = x/42

420 + 42x = 57x

420 = 15x

x = 420/15 = 28

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When solving a 2 step inequality, when do you flip the inequality sign, i keep getting these questions wrong, pls help, i mark b
vaieri [72.5K]
You flip the signs when you are dividing by a negative value.
-2x+3>15
-2x>15-3
-2x>12
x<12/-2
x<-6
Now to test this
Try putting x in the original equation when it is -5.
-2(-5)+3>15
10+3>15
13>15
This is false because our answer says x is less than -6.
Now any value less than -6 will work so let's go with -7.
-2(-7)+3>15
14+3>15
17>15
This result is True.
Hope this helps out!







3 0
3 years ago
4/5 of the magnets in George's collection are flags. 1/2 of those flags are U.S. flags.
enyata [817]

Answer: 2/5

Step-by-step explanation: How I got this answer is that 4/5 of George's collection are flags right?  So I divided 4/5 by 2 to get 0.4 or 2/5.  Hope this helps!!

3 0
3 years ago
Read 2 more answers
Stuck On this one too. Think I’m missing a step
Elis [28]

Answer:

The answer is B) 152

Step-by-step explanation:

3 0
2 years ago
Given b(x) - 1X+4. what is b(-10)? <br> -10<br> -6<br> 6<br> 14
liraira [26]

Answer:

D. 1×10⁻⁸ M

Explanation:

[H⁺] [OH⁻] = 10⁻¹⁴

(1×10⁻⁶) [OH⁻] = 10⁻¹⁴

[OH⁻] = 1×10⁻⁸

5 0
2 years ago
Read 2 more answers
M is the midpoint of segment GR. G has coordinates (11,-5) and M is (4,-4) Find the coordinates of R
7nadin3 [17]

Answer:

  • (3, -3)

Step-by-step explanation:

<u>Given:</u>

  • G = (11,-5)
  • M = (4,-4)
  • R = ?

<u>Solution</u>

  • R(x, y)

<u>As per midpoint formula;</u>

  • 4 = (11 + x)/2  ⇒ x + 11 = 8 ⇒ x = 3
  • -4 = (-5 + y)/2 ⇒ y - 5 = -8 ⇒ y = -3
  • R = (3, -3)
4 0
3 years ago
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