1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Alex_Xolod [135]
3 years ago
9

Question 5(Multiple Choice Worth 4 points)

Mathematics
1 answer:
Aleks [24]3 years ago
7 0

Hello!

The number 49 is similar to other numbers like 25, 81, 4, or 64. All these numbers are perfect squares. Perfect squares are numbers multiplied by itself. Here is a list of commonly used perfect squares.

  • 1 × 1 = 1
  • 2 × 2 = 4
  • 3 × 3 = 9
  • 4 × 4 = 16
  • 5 × 5 = 25
  • 6 × 6 = 36
  • 7 × 7 = 49
  • 8 × 8 = 64
  • 9 × 9 = 81
  • 10 × 10 = 100
  • 11 × 11 = 121
  • 12 × 12 = 144

From the list above, the square root of 49 is 7, but the question asks for the <u>negative</u><u> square root of 49</u>, which is written as: -√49.

To simplify this expression, first, simplify the radical, and then multiply the product by negative one.

7 × -1 = -7

Therefore, the negative square root of 49 is choice C, - 7.

You might be interested in
Five less than twice a number is seven
mart [117]

Answer:

2x - 5 = 7

2x -5 + 5 = 7 + 5

2x = 12

2/2x = 12/2

x = 6

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Una señora compro medio kilo de pescado y 450 gramos de carne de res. ¿Cuánto le falta para completar el kilo?
matrenka [14]

Answer:

LE FALTA 50 gr

Step-by-step explanation:

PESCADO MEDIO KG= 500 gr

CARNE DE RES= 450 gr

500+450=950 gr

1000 - 950= 50 gr

8 0
2 years ago
What is the equation for n in 5n+10=n+4
In-s [12.5K]

Answer:

-3/2 or 1.5

Step-by-step explanation:

5n + 10 = n + 4

5n - n = -10 + 4

4n = -6

n = -6/4

n = -3/2 (or -1.5)



3 0
3 years ago
Mr. rancher wants to build a pen for his horse. he wants the pen to be 40 yards long and 50 yards wide. if the fencing comes in
fomenos
(50 x 2) + (40 x 2) = 180 yards x 3 = 540 feet of fence needed. 540 / 5 = 108. He will need 108 pieces of fencing 
7 0
3 years ago
Solve this <br> <img src="https://tex.z-dn.net/?f=4%5Cleft%285x-2%5Cright%29%3D2%5Cleft%289x%2B3%5Cright%29" id="TexFormula1" ti
vampirchik [111]

Answer:

  • Solution of equation ( x ) = <u>7</u>

Step-by-step explanation:

In this question we have given with an equation that is <u>4</u><u> </u><u>(</u><u> </u><u>5</u><u>x</u><u> </u><u>-</u><u> </u><u>2</u><u> </u><u>)</u><u> </u><u>=</u><u> </u><u>2</u><u> </u><u>(</u><u> </u><u>9</u><u>x</u><u> </u><u>+</u><u> </u><u>3 </u><u>)</u><u>.</u> And we are asked to solve this equation that means we have to find the value of <u>x</u><u>.</u><u> </u>

<u>Solution</u><u> </u><u>:</u><u> </u><u>-</u>

<u>\quad \longrightarrow \: 4 ( 5x - 2 ) = 2 ( 9x + 3 )</u>

<u>Step </u><u>1</u><u> </u><u>:</u> Removing parenthesis :

\quad \longrightarrow \:20x - 8 = 18x + 6

<u>Step </u><u>2</u><u> </u><u>:</u> Adding 8 from both sides :

\quad \longrightarrow \:20x - \cancel{ 8 }+  \cancel{8} = 18x + 6 + 8

On further calculations we get :

\quad \longrightarrow \:20x = 18x + 14

<u>Step </u><u>3 </u><u>:</u> Subtracting 18 from both sides :

\quad \longrightarrow \:20x - 18x =  \cancel{18x }+ 14 -  \cancel{18}

On further calculations we get :

\quad \longrightarrow \:2x = 14

<u>Step </u><u>4</u><u> </u><u>:</u> Dividing with 2 on both sides :

\quad \longrightarrow \: \frac{ \cancel{ 2}x}{ \cancel{2}}  =   \cancel{\frac{14}{2} }

On further calculations we get :

\quad \longrightarrow \:  \blue{\boxed{ \frak{x = 7}}}

  • <u>Therefore</u><u>,</u><u> </u><u>solution</u><u> </u><u>of </u><u>this </u><u>equation</u><u> </u><u>is </u><u>7</u><u> </u><u>or </u><u>we </u><u>can </u><u>say </u><u>that </u><u>value </u><u>of </u><u>this </u><u>equation</u><u> </u><u>is </u><u>7</u><u> </u><u>.</u>

<u>Verifying</u><u> </u><u>:</u><u> </u><u>-</u>

We are verifying our answer by substituting value of x in given equation. So ,

  • 4 ( 5x - 2 ) = 2 ( 9x + 3 )

  • 4 [ 5 ( 7 ) - 2 ] = 2 [ 9 ( 7 ) + 3 ]

  • 4 ( 35 - 2 ) = 2 ( 63 + 3 )

  • 4 ( 33 ) = 2 ( 66 )

  • 132 = 132

  • L.H.S = R.H.S

  • Hence, Verified.

<u>Therefore</u><u>,</u><u> </u><u>our </u><u>value</u><u> for</u><u> x</u><u> is</u><u> </u><u>correct </u><u>.</u>

<h2><u>#</u><u>K</u><u>e</u><u>e</u><u>p</u><u> </u><u>Learning</u></h2>
4 0
2 years ago
Read 2 more answers
Other questions:
  • I'm not even sure where to start.
    10·2 answers
  • Select the term that does NOT describe the triangle. Select all that apply
    8·2 answers
  • What is the magnitude of the resultant of z-y?<br> x=9i-j-2k<br> y=-6i+2j-k<br> z=-i+5j+3k
    13·2 answers
  • In the expression 27 ÷ 9 x 3 – 4 x 2, explain why 27 ÷ 9 is the first operation you would do
    7·2 answers
  • Numbers like -3, -2, -1, 0, 1, 2, 3 are called
    8·1 answer
  • Please help! Which are acceptable names for the line?
    8·2 answers
  • Find lim PLEASE I NEED HELP ASAP !!!!
    9·1 answer
  • Find the value of x in (5,x),(x,14) so that the line line containing them is 7/2.
    8·1 answer
  • Pls help me with this question
    13·1 answer
  • Mrs. Jagielski has $300 put aside for Christmas shopping. She spent 65% of her money on
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!