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Minchanka [31]
3 years ago
12

Math hw help simplifu the problem by combining like terms

Mathematics
1 answer:
denpristay [2]3 years ago
5 0
5.) -4b-15
6.) 13ac-4a+8b
7.) 4a-21b
8.) -14y
9.) -2x+21y
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Mark bikes 4/10 of a mile in 1/5 of an hour. Find marks average speed in miles per hour.
Triss [41]

He bikes 4/10 of a mile in 1/5 of an hour

That is 4/10 miles in 1/5 hours

Average speed = Distance/ time = 4/10 ÷ 1/5 = 4/10 × 5/1 = 2 miles/hour

6 0
3 years ago
What is the equation of a line perpendicular to 3X+6Y= -3 and passes through the points (1,-5)
LenaWriter [7]

Answer:

Step-by-step explanation:

6y = -3x - 3

y = -1/2x - 1/2

perp. 2

y + 5 = 2(x - 1)

y + 5 = 2x - 2

y = 2x - 7

3 0
3 years ago
Write the equation of the line in fully simplified slope-intercept form. ​
Anettt [7]

Answer: y= -3/2 -5

explanation:

The slope is 3/-2, and it slopes down. making it a negative slope/fraction

And the point is on -5 on the Y axis.

Making the answer y= -3/2-5

3 0
2 years ago
Read 2 more answers
Use the discriminant to describe the roots of each equation. Then select the best description.
Paha777 [63]

The <em>quadratic</em> equation 3 · x² + 7 · x - 2 = 0 has a <em>positive</em> discriminant. Thus, the expression has two <em>distinct real</em> roots (<em>real</em> and <em>irrational</em> roots).

<h3>How to determine the characteristics of the roots of a quadratic equation by discriminant</h3>

Herein we have a <em>quadratic</em> equation of the form a · x² + b · x + c = 0, whose discriminant is:

d = b² - 4 · a · c     (1)

There are three possibilities:

  1. d < 0 - <em>conjugated complex</em> roots.
  2. d = 0 - <em>equal real</em> roots (real and rational root).
  3. d > 0 - <em>different real</em> roots (real and irrational root).

If we know that a = 3, b = 7 and c = - 2, then the discriminant is:

d = 7² - 4 · (3) · (- 2)

d = 49 + 24

d = 73

The <em>quadratic</em> equation 3 · x² + 7 · x - 2 = 0 has a <em>positive</em> discriminant. Thus, the expression has two <em>distinct real</em> roots (<em>real</em> and <em>irrational</em> roots).

To learn more on quadratic equations: brainly.com/question/2263981

#SPJ1

7 0
2 years ago
El acero de alta resistencia es el principal material de los submarinos actuales, con un límite de profundidad de 250 a 400 m pa
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