3 years ago

Suppose that a is a nonzero constant for which the equation ax^2+20x+7=0 has only one solution. find this solution.

Mathematics

1 answer:

Talja [164]3 years ago

4 0

$\Delta=0\\\\
\Delta=20^2-4\cdot a\cdot7=400-28a\\
400-28a=0\\
28a=400\\
a=\dfrac{400}{28}=\dfrac{100}{7}

$

You might be interested in

Solve the equation. 4(2m – 1) = 16

ahrayia [7]

Answer:

8m-4=16

8m=20

m=2.5

Step-by-step explanation:

8 0

2 years ago

Read 2 more answers

What is the best result for h?

Kryger [21]

Answer: First option.

Step-by-step explanation:

To solve for "h" from the given the equation $S=2\pi rh+2\pi r^2$ , you need to:

Apply the Subtraction property of equality and subtract $2\pi r^2$ to both sides of the equation.

Then you need to apply the Division property of equality and divide both sides of the equation by $2\pi r$ .

Then:

$S-2\pi r^2=2\pi rh+2\pi r^2-2\pi r^2\\\\S-2\pi r^2=2\pi rh\\\\\frac{S}{2\pi r}-\frac{2\pi r^2}{2\pi r}=\frac{2\pi rh}{2\pi r}\\\\\frac{S}{2\pi r}-r=h$

6 0

3 years ago

Read 2 more answers

Can you solve the 3 questions below?

trasher [3.6K]

Answer:

a - car

b - plane b

10 overs

6 0

3 years ago

24x + 30x = 3x + 24 + 4

Alinara [238K]

24x + 30x = 3x + 24 + 4

54x=3x+24+4

54x=3x+28

54x-3x=28

51x=28

X=28/51

7 0

3 years ago

Read 2 more answers

Please!!! Follow me<br>_/(•_•)\_

Vikki [24]

Answer:

Why

Step-by-step explanation:

How do I follow I'm new to dis

7 0

3 years ago

Read 2 more answers