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3 years ago

Is 49 a perfect square

Mathematics

2 answers:

Sholpan [36]3 years ago

8 0

Yes, it is also a square number

dangina [55]3 years ago

8 0

Answer:

Yes, if you square root 49, it will give you 7.

$\sqrt{49} =7$

7 x 7=49

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Solve x^2 + x - 12 = 0

bogdanovich [222]

Answer:

x₁ = -4

x₂ = 3

Step-by-step explanation:

x²+ x + 12 = 0

x = {-1±√((1²)-(4*1*-12))} / (2*1)

x = {-1±√(1+48)} / 2

x = {-1±√49} / 2

x = {-1±7} / 2

x₁ = {-1-7} / 2 = -8/2 = -4

x₂ = {-1+7} / 2 = 6/2 = 3

Check:

x₁

-4² + (-4) - 12 = 0

16 - 4 - 12 = 0

x₂

3² + 3 - 12 = 0

9 + 3 - 12 = 0

6 0

1 year ago

You are trapped in a dark cave with three indistinguishable exists on the walls. One of the exits takes you 3 hours to travel an

bija089 [108]

Answer:

6 HOURS

Step-by-step explanation:

5 0

3 years ago

A viewfinder has a triangular lens. Some of the measurement of the length are shown below. Which of the following best represent

S_A_V [24]

Answer:

Step-by-step explanation:

First, we need to find the unknown angle of the triangle.

40 + 20 = 60

180 - 60 = 120

So the unknown angle is 120.

Then, we can use the law of sines to create a proportion.

sin(120)/8 = sin(40)/a

Then, we can simplify this.

a is about 5.9, or answer choice A.

5 0

3 years ago

Which expression is equivalent to n+n+n? A. 3^n B. 3n C. n^3 D. n+3

Irina18 [472]

Answer:

B. 3n

Step-by-step explanation:

n + n + n = 3n

------------------------------------------

3n = n + n + n

#IhopeThisHelp

5 0

2 years ago

Compute the exact value of the function for the given x-value without using a calculator.F(x)=6^x for x = 3

Cloud [144]

First: Replace “x” with its known value. Since x = 3, plug it into the formula.
• F(3) = 6^3
Second: Solve the formula.
• 6^3 = 6 x 6 x 6 = 216
• F(3) = 216

4 0

3 years ago