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Zanzabum
3 years ago
13

Math question about equations or inequalities

Mathematics
1 answer:
lapo4ka [179]3 years ago
4 0
3a+8 \ \textless \  29 \\  \\ 3a \ \textless \  21 \\  \\ a \ \textless \  7

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Find the value of x that makes A || B.
vladimir1956 [14]

Answer:

x=20

Step-by-step explanation:

3x-10=x+30

2x-10=30

2x=40

x=20

4 0
3 years ago
Read 2 more answers
2<br> Solve for a.<br> 5<br> a<br> = √ [?]<br> a =<br> Pythagorean Theorem: a² + b2 = c²
yuradex [85]

Answer:

a  =  \sqrt{21}

Step-by-step explanation:

  • Pythagorean theorem
  • \sqrt{a ^{2}  + b ^{2}   }  = c \\  \sqrt{c ^{2} - b ^{2}  }  = a
  • \sqrt{5 ^{2} - 2 ^{2}  }  =  \sqrt{21}
4 0
2 years ago
Read 2 more answers
If two points known on the line AB in the coordinate plane is (7,15) and (18,42), calculate the following..
Ksju [112]

<u>Answer:</u>

  • Slope = 27/11
  • AB = 29.15 u

<u>Step-by-step explanation:</u>

<u>Given :- </u>

  • Two points are given to us .
  • The points are A(7,15) and B(18,42)

<u>To Find</u> :-

  • The slope of the line .
  • The length of line AB .

We can find the slope of the line passing through the points ( x_1,y_1) and ( x_2,y_2)as ,

\implies m = \dfrac{ y_2-y_1}{x_2-x_{1}}

  • Plug in the respective values ,

\implies m = \dfrac{ 42-15}{18-7} \\\\\implies \boxed{ m = \dfrac{ 27}{11 }}

<u>Hence the slope of the line is 27/11 .</u>

\rule{200}2

<u>Finding the length of AB :-</u>

  • We can find the distance between them by using the Distance Formula .

\implies Distance =\sqrt{ (x_2-x_1)^2+(y_2-y_1)^2} \\\\\implies Distance =\sqrt{ (18-7)^2+(42-15)^2 }  \\\\\implies Distance =\sqrt{ 11^2 + 27^2 } \\\\\implies Distance =\sqrt{ 121 + 729 } \\\\\implies Distance = \sqrt{ 850} \\\\\implies \boxed{ Distance = 29.15 \ units }

<u>Hence the length of AB is 29.15 units .</u>

5 0
3 years ago
marla has 4.55 in dimes and quarters. if she ha s7 more quarters than dimes, how many quarters doe she have?
Jlenok [28]

Answer:

number of dimes is 8

number of quarters is 15

Step-by-step explanation:

let 'd' = number of dimes

let 'd+7' = number of quarters

.10d + .25(d + 7) = 4.55

.10d + .25d + 1.75 = 4.55

.35d = 2.80

d = 8

q = 7 + 8

8 0
3 years ago
At the carnival, Sally purchased 20 tickets and a drink that was $4.50. Her total for everything was $44.50.
marshall27 [118]
$2 is the answer I assume
6 0
3 years ago
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