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Artyom0805 [142]
3 years ago
9

What two factors of -21 add up to -20

Mathematics
1 answer:
yawa3891 [41]3 years ago
5 0
1 and -21. Think about it! 1x-21 = -21
-21+1 = -20
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Select all of the following expressions that are equivalent to 16a+40 .
lina2011 [118]
The first one is true
<span>4(4a+10)  is 
</span>16 a + 40 after distribution

The second one is also true
<span>2(8a+20) 
16a + 40 after distribution

Third is not true
</span><span>4a(4+10a) 
</span><span>16a + 40a^2 after distribution

Last one is also true
</span><span>8(2a+5)
16a + 40 after distribution

Hope this helps :)</span>
5 0
3 years ago
What's the slope-intercept form that passes through the points (0, -1) and (1, 5)?
Rzqust [24]

Answer:

<h2>         y = 6x - 1</h2>

Step-by-step explanation:

\bold{slope\, (m)=\dfrac{change\ in\ Y}{change\ in\ X}=\dfrac{y_2-y_1}{x_2-x_1}}

(0, -1)    ⇒     x₁ = 0,  y₁ = -1

(1, 5)     ⇒     x₂ = 1,  y₂ = 5

So the slope:

                     \bold{m=\dfrac{5+1}{1-0}=\dfrac{6}{1}=6}

The slope-intercept form of the equation of line is y = mx + b, where m is the slope and b is the y-intercept of the line.

(0, -1)    ⇒     x₀ = 0,  y₀ = -1      ⇒   b = -1

Therefore:

                 y = 6x - 1          ←  the slope-intercept form of the equation

5 0
3 years ago
For the following quadratic equation, find the discriminant.<br> x^2+ 10x + 44 = 0
Alina [70]

Answer:

padlet        com     /vpena20241    

/sv1blyklvnvfbcdw

Step-by-step explanation:

4 0
3 years ago
The length of a rectangle is twice the with. If the perimeter of the rectangle is 60 units, find the area of the garden
Darya [45]

w - width

2w - length

60 - perimeter

w + w + 2w + 2w = 6w - perimeter

The equation:

6w = 60    <em>divide both sides by 6</em>

w = 10 → 2w = 2 · 10 = 20

The area: A = width × length

A = (10)(20) = 200

<h3>Answer: The area of the garden is equal 200 square units.</h3>
4 0
3 years ago
Find the mode and median of the data 12 16 12 14 12 15 15
Basile [38]

Step-by-step explanation:

1. mode is the value which appears most

mode = 12

median is the value in the

middle

median = 14

2. mode = 12

median = 14

6 0
3 years ago
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