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3 years ago

Math question about equations or inequalities

1 answer:

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 Solve for a. 5 a = √ [?] a = 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]

Answer:

Slope = 27/11
AB = 29.15 u

Step-by-step explanation:

Given :-

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

To Find :-

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 ,

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

Hence the slope of the line is 27/11 .

$\rule{200}2$

Finding the length of AB :-

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

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

Hence the length of AB is 29.15 units .

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