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dangina [55]
3 years ago
7

9. Which is a solution of the equation 5(x – 8) = -55 ?

Mathematics
1 answer:
g100num [7]3 years ago
3 0

Answer: c. x = -3

5(x - 8) = -55

⇔ 5x - 40 = -55

⇔ 5x = -55 + 40 = -15

⇔ x = -15/5

⇔ x = -3

Step-by-step explanation:

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Calib received $50 for his birthday and put it in his piggy bank. Each week, he puts 2 more dollars in his bank. The amount of m
Lady bird [3.3K]

Answer:

According to Lara value of w=44

So, D=2w+50

Put value of w=44

D=2(44)+50

D=88+50

D=138

Your answer is 138.


8 0
4 years ago
for what value of k, the line joining 3x-ky+7=0 is perpendicular to the line joining (4 ,3) and ( 5, -3).
Schach [20]

Answer:

  • k = 18

=========

<h2>Given</h2>

<h3>Line 1</h3>
  • 3x - ky + 7 = 0

<h3>Line 2</h3>
  • Passing through the points (4, 3) and (5, - 3)

<h2>To find</h2>

  • The value of k, if the lines are perpendicular

<h2>Solution</h2>

We know the perpendicular lines have opposite reciprocal slopes, that is the product of their slopes is - 1.

Find the slope of line 1 by converting the equation into slope-intercept from standard form:

<u><em>Info:</em></u>

  • <em>standard form is ⇒ ax + by + c = 0, </em>
  • <em>slope - intercept form is ⇒ y = mx + b, where m is the slope</em>

  • 3x - ky + 7 = 0
  • ky = 3x + 7
  • y = (3/k)x + 7/k

Its slope is 3/k.

Find the slope of line 2, using the slope formula:

  • m = (y₂ - y₁)/(x₂ - x₁) = (-3 - 3)/(5 - 4) = - 6/1 = - 6

We have both the slopes now. Find their product:

  • (3/k)*(- 6) = - 1
  • - 18/k = - 1
  • k = 18

So when k is 18, the lines are perpendicular.

4 0
2 years ago
Which statements about the system are true? Select two options.
butalik [34]

Answer:

no solution

Step-by-step explanation:

y = (1/3)x - 4

3y - x = -7

put the first equation into the second

3(1/3)x - (3)4 - x = -7

x - 12 - x = -7

-12 = -7 can never be true so this is no solution

6 0
2 years ago
I need an example of ‘what is a 3rd degree polynomial with two terms’ ?
Zanzabum

Answer:Cubic polynomials are polynomials of degree three. Examples include \begin{align*}x^3+8, x^3-4x^2+3x-5\end{align*}, and so on. Notice in these examples, the largest exponent for the variable is three (3). They are all cubics

Step-by-step explanation:

3 0
3 years ago
A checkbook register began the page with a balance of $600.84. A check was written for $89.50. A deposit was made for $55. Bank
iogann1982 [59]
Your total is $443.34
5 0
3 years ago
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