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3 years ago

The difference of the square of a number and 18 is equal to 3 times that number. Find

Mathematics

1 answer:

ololo11 [35]3 years ago

7 0

Answer:

Step-by-step explanation:

To solve this, you can set up an equation as such:

x²-18= 3x

Now, rearrange this to make it an equation in standard form:

x²-3x-18=0.

Simply turn this equation into factored form:

(x-6)(x+3)= 0.

The only positive solution here is x=6.

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27. The square of a number is 8 more than 420 minus 347. What is the number?

Stells [14]

Answer:

x=9 or -9

Step-by-step explanation:

the equation is:x^2-8=420-347

420-347=73

if x=9 then 81-8=73

and then 73=73

so x=9

hope this helps!

please mark my answer as brainliest! thanks! :)

8 0

3 years ago

AB || DE Find: m∠A = m∠ by reason m∠ACB = m∠ by reason

swat32

If you find a first you will be able to find b a little faster then it is super easy after that you got this!

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3 years ago

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To the nearest whole number, what is the best estimate of 214?

kozerog [31]

Answer:

210 is the answer to this question.

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3 years ago

Find the degree measure of each angle in the triangle.

Alex777 [14]

Answer:

∠R = 56°
∠Q = 90°
∠S = 34°

Step-by-step explanation:

The given triangle is a right angled triangle.

So, the angles in the triangle are :

90°
(2x + 38)°
(5x - 11)°

Solving according to angle sum property,

Sum of all angles in a triangle is 180°

$\longrightarrow$ 90° + (2x + 38)° + (5x - 11)° = 180°

$\longrightarrow$ 117° + 7x = 180°

$\longrightarrow$ 7x = 180° - 117°

$\longrightarrow$ 7x = 63°

$\longrightarrow$ x = 9

Angles =

$\longrightarrow$ 2(9) + 38

$\longrightarrow$ 56°

$\longrightarrow$ 5(9) - 11

$\longrightarrow$ 34°

∠R = 56°
∠Q = 90°
∠S = 34°

The angles are 56°, 90° and 34°.

4 0

3 years ago

Can someone help me on this pleaseeee

CaHeK987 [17]

The answer too this question is 4

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2 years ago

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