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dezoksy [38]
3 years ago
15

Which set of equations has (-4,1) as its solution? A and B B and D A and C B and C

Mathematics
1 answer:
Alika [10]3 years ago
6 0
The set of equations that has (-4,1) is A and C
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X sqaured plus 4x plus 20 equlas 12x minus 5
skelet666 [1.2K]

Answer:

x² + 4x + 20 = 12x - 5

x² + 4x - 12x + 20 + 5 = 0

x² - 8x + 25 = 0

Δ = √b² - 4ac

= √(-8)² - 4×1×25

= √64-100

= √(-36)

x ∉ R

3 0
3 years ago
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What is the value of x? please hurry
larisa86 [58]

Answer:

x = 22°

Step-by-step explanation:

158 + x = 180

x = 180 - 158

x = 22

6 0
3 years ago
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write an equation for a circle that is centered at the origin and has a radius of 6. show your work.​
taurus [48]

(x-h)^2 + (y-k)^2 = r^2

(x)^2 + (y)^2 = 36

8 0
3 years ago
15 points?
pychu [463]

━━━━━━━☆☆━━━━━━━

▹ Answer

<em>(w = 7, w = 8/5)</em>

<em></em>

▹ Step-by-Step Explanation

(7 - w)(5w - 8) = 0

Separate:

7 - w = 0

5w - 8 = 0

Solve:

w = 7

5w - 8 = 0

(w = 7, w = 8/5)

Hope this helps!

CloutAnswers ❁

━━━━━━━☆☆━━━━━━━

7 0
4 years ago
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A rectangle has a length of 4 feet and a perimeter of 14 feet. What is the perimeter of a similar rectangle with a width of 9 fe
mina [271]

Answer:

Option C. 42\ ft

Step-by-step explanation:

we know that

If two figures are similar, then the ratio of its corresponding sides is equal to the scale factor and the ratio of its perimeter is equal to the scale factor too

step 1

Find the width of the rectangle that has a length of 4 feet and a perimeter of 14 feet

The perimeter of a rectangle is equal to

P=2(L+W)

substitute the values and solve for W

14=2(4+W)

W=7-4=3\ ft

step 2

Find the scale factor

Let

z-----> the scale factor

To find the scale factor divide the width of the larger rectangle by the width of the smaller rectangle

so

9/3=3

step 3

Find the perimeter of the larger rectangle

To find the perimeter of the larger rectangle multiply the perimeter of the smaller rectangle by the scale factor

so

3*14=42\ ft

5 0
3 years ago
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