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Deffense [45]
3 years ago
10

Theo started to solve the quadratic equation (x + 2)^2 – 9 = –5. He added 9 to both sides and the resulting equation was (x + 2)

^2 = 4. Next, he took the square root of each side. Which was the resulting equation of that step?
x + 2 = ±4
x + 2 = ±2
x + 2 = ±8
x + 2 = ±16
Mathematics
2 answers:
Sliva [168]3 years ago
6 0
When we take the square root of each side, the equation would become:
abs (x+2) = 2
⇒ x+2 = <span>±2.

The final answer is </span><span>x + 2 = ±2.
</span>
Hope this helps~



Ugo [173]3 years ago
6 0

The square root of  (x + 2)²  is  (x + 2) .

The square roots of  4  are  +2  and  -2 .

So the resulting equation was            x + 2  =  <span>± 2 .

From there, it was pretty easy for Theo to find the solutions
to the original equation . . .

If  (x + 2) = +2 , then  x = 0 .

If  (x + 2) = -2 , then  x = -4 .

</span>
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Que es el volumen (en matematicas)
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Answer:

En matemáticas, el volumen se puede definir como el espacio tridimensional encerrado por un límite u ocupado por un objeto. Aquí, los bloques y los libros ocupan espacio. ... El volumen de un objeto se mide en unidades cúbicas como centímetros cúbicos, pulgada cúbica, pie cúbico, metro cúbico.

Step-by-step explanation:

espero que esto ayude.

7 0
2 years ago
If sin y° = 7 over q and tan y° = 7 over r, what is the value of sec y°?
Tomtit [17]

Answer:

Sec y = q/r

Step-by-step explanation:

Sin y = 7/q

tan y = 7/r

Mathematically cos y = sin y/tan y

But sec y = 1/cos y

So therefore sec y = tan y/sin y

So that would be ;

7/r divided by 7/q

= 7/r * q/7

= q/r

3 0
3 years ago
What is the perimeter of the smaller triangle?
Luden [163]

Answer:

14 mm

Step-by-step explanation:

Just as the little side is 1/4 of the larger side , so is the perimeter

1/4 * 56 = 14 mm

6 0
2 years ago
Find the average value of the function over the given interval and all values of x in the interval for which the function equals
MrRissso [65]

The average value of f(x)=4x^3-3x^2 over [-1, 3] is

\displaystyle\frac1{3-(-1)}\int_{-1}^3(4x^3-3x^2)\,\mathrm dx=\frac14\left(x^4-x^3\right)\bigg|_{-1}^3=\frac{(3^4-3^3)-(1+1)}4=\boxed{13}

8 0
2 years ago
Is this one question correct
bazaltina [42]

Answer: 2/3ft or C

Step-by-step explanation: Solve for b in the area of a triangle equation, A=1/2bh. Multiply 1/2 by 2 on both sides to cancel it: A(2)=bh.  Divide both sides by h: \frac{A(2)}{h}=b

A = 2/5

h = 6/5

b = ?

Next, we can plug the numbers into this equation: \frac{2/5(2)}{6/5}=b

Multiply 2 and 2/5: 4/5 / 6/5

Take the reciprocal of 6/5: 4/5 x 5/6 = \frac{20}{30}

\frac{20}{30} ÷ \frac{10}{10} = \frac{2}{3}

7 0
3 years ago
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