3 years ago

Which of these quadrilaterals are rectangles?

Mathematics

1 answer:

VikaD [51]3 years ago

5 0

Answer:Parallelogram, rhombus ,square

Step-by-step explanation:

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daser333 [38]

Ratio of 2 complementary angles = 4:5
Let first angle be 4x
Let second angle be 5x
Sum of two complementary angles = 90
4x + 5x = 90
9x = 90
x = 90/9 = 10
First angle = 4x = 4*10 = 40
Second angle = 5x = 5*10 = 50
I hope it is helpful...

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3 years ago

Solve the equation x+0.7=1-0.2x In two different ways

timama [110]

Add 0.2x to both sides
1.2x+0.7= 1
1.2x=.3
x=.3/1.2
x=.25

option #2
subtract .7 on both sides

x=1-.7-.2x
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aksik [14]

I don’t get this question right here

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What is the most convenient method to solve the quadratic equation ( x + 4 )² = 15

IgorC [24]

Answer:

Factoring

Step-by-step explanation:

(x+4)² = 15

x² + 8x + 16 = 15

x² + 8x + 1 = 0

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I hope this helps you :)

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A line that includes the point (0,0) has a slope of -9. What is its equation in slope-intercept

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