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avanturin [10]
3 years ago
5

How would I do this Need help

Mathematics
2 answers:
Naddik [55]3 years ago
8 0
The answer to this problem is A
Annette [7]3 years ago
7 0

10^2= 2^2 x a^2

a^2= 100-4

a= √96

a= 9.79..

a= 9.8

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the highest possible score on an entrance exam is 800 points. what scores are between 80% to 90% of the highest possible score?
garik1379 [7]

Answer: 640-720

Step-by-step explanation:

5 0
3 years ago
Find all solutions to the following system of equations -y²+6y+x-9=0 ; 6y=x+27.Illustrate with a graph.
Dimas [21]

Answer:

The solution to the system is the pair (9, 6)

Step-by-step explanation:

Hi!

First, let´s write the system of equations:

-y² + 6y + x -9 = 0

6y = x +27

The solutions of the system are the pairs (x, y) that satisfy both equations.

Let´s take the second equation and solve it for x:

6y = x +27

Subtract 27 from both sides of the equation

6y - 27 = x

Now, we can replace x in the first equation and solve it for y:

-y² + 6y + x -9 = 0

-y² + 6y + 6y - 27 -9 = 0

-y² + 12y - 36 = 0

Notice that -y² + 12y - 36 = -(y - 6)², then:

-(y - 6)² = 0

y - 6 = 0

y = 6

(alternatively you can solve the quadratic equation using the quadratic formula).

Now let´s find the value of x:

x = 6y -27

x = 6·6 -27

x = 9

The solution to the system is the pair (9, 6)

Please see the attached figure. The point where the curves intersect is the solution to the system.

6 0
3 years ago
Estimate the measure of angle 1
fenix001 [56]

Answer:

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Solve the formula d = rt for r.<br><br> A. r = d - t<br> B. r = t/d<br> C. r = d/t<br> D. r = dt
PIT_PIT [208]
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Solve 5x^2+8x+3=0 for x
Black_prince [1.1K]

5x^2+8x+3=0

factor

(5x+3) (x+1)=0

using the zero product property

5x+3 =0  x+1 =0

5x=-3   x=-1

x=-3/5   x=-1


8 0
3 years ago
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