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
patriot [66]
3 years ago
13

you have a 5-inch by 7-inch picture that you framed. When you hung the picture, you found that the entire area is 69.56 in. What

is the width of the frame?​

Mathematics
2 answers:
riadik2000 [5.3K]3 years ago
8 0

Answer:  d) 2.4 inches

<u>Step-by-step explanation:</u>

Let x represent the width of the frame

Then the area of the frame is:

(x + 5)(x + 7) = 69.56

Rewrite it in Standard form of a quadratic equation:

x² + 12x + 35 = 69.56

x² + 12x - 34.56 = 0

Use Quadratic Formula to solve for x:

x=\dfrac{-b+\sqrt{b^2-4ac}}{2a}\\\\\\x=\dfrac{-12+\sqrt{12^2-4(1)(-34.56)}}{2(1)}\\\\\\x=\dfrac{-12+\sqrt{282.24}}{2}\\\\\\x=\dfrac{-12+16.6}{2}\\\\\\x=\dfrac{4.8}{2}\\\\\\x=\large\boxed{2.4}

Montano1993 [528]3 years ago
4 0

Answer:

d. 2.4 in

Step-by-step explanation:

So initially w/o frame the area was 5 x 7 = 35 sq in.

Now we have to add the width of the frame to both dimensions.

(5+w)(7+w) = 69.56 sq in

35 + 7w + 5w + w² = 69.56

w² + 12w + 35 = 69.56

w² + 12w - 34.56 = 0

I use the quadratic formula to solve this (x = -b±√b²-4ac / 2a). I cheat by using a quadratic program on the calculator :,)

w = 2.4

w = -14.4

Since we can't have a negative width, the answer must be <u>w = 2.4 inches.</u>

You can also just plug the answer choices one-by-one into the calculator with guess-and-check because this is multiple choice.

You might be interested in
Anybody know this struggling all day with these math questions
Inga [223]

Answer:

its (-1/2,-5/2),(2,5)

Step-by-step explanation:

Substitute 2x2−3 for y into y=3x−1then solve for x.

5 0
3 years ago
Thr four angles of a quadrilateral L are in the ratio 5:2:3:8find the angle
Anuta_ua [19.1K]
Ratio = 5:2:3:8
Sum of all internal angles = 360°
5x + 2x + 3x + 8x = 360°
18x = 360°
x = 20°
Therefore,
5x = 100°
2x = 40°
3x = 60°
8x = 160°
5:2:3:8 :: 100:40:60:160.
5 0
3 years ago
Read 2 more answers
What is the multiplicative inverse of -3/11 and -3?<br> Please help and it's level is 7 th grade
Margaret [11]

Answer:

-11/3

-1/3

The multiplicative inverse of a fraction a/b is b/a. For the multiplicative inverse of a real number, divide 1 by the number. For example, the reciprocal of 5 is one fifth (1/5 or 0.2), and the reciprocal of 0.25 is 1 divided by 0.25, or 4.

Step-by-step explanation:

Hope it is helpful......

5 0
3 years ago
Which of the following is a number set that contains the number –5? A. integers B. whole numbers C. natural numbers D. irrationa
meriva
It would be A or B, as an integer can be anything and it’s a while number.
6 0
3 years ago
Find the distance between (0,-2), (-5,-1)
svlad2 [7]

\bf ~~~~~~~~~~~~\textit{distance between 2 points}\\\\(\stackrel{x_1}{0}~,~\stackrel{y_1}{-2})\qquad(\stackrel{x_2}{-5}~,~\stackrel{y_2}{-1})\qquad \qquadd = \sqrt{( x_2- x_1)^2 + ( y_2- y_1)^2}\\\\\\d=\sqrt{[-5-0]^2+[-1-(-2)]^2}\implies d=\sqrt{(-5-0)^2+(-1+2)^2}\\\\\\d=\sqrt{(-5)^2+1^2}\implies d=\sqrt{26}\implies d\approx 5.099

5 0
3 years ago
Other questions:
  • Jada’s teacher ask her to write a three-digit number that uses the digit 4 once and the digit 7 twice. The value of one 7 needs
    12·1 answer
  • Adison earned 25$ mowing her neighbors lawn.then she loaned her friend 18$,and got 50$ from her grandmother for her birthday. sh
    13·2 answers
  • If x is a positive integer then the solution set of 4x+2&lt;14 is
    15·1 answer
  • Determine the values of a for which the following system of linear equations has no solutions, a unique solution, or infinitely
    5·1 answer
  • Two lengths of a triangle measure 6 feet and 10 feet what can the length of the third side
    12·1 answer
  • Margo has $80 to spend she wants to buy as many DVDs as possible after buying aCD that cost $18 each at most what is the greates
    7·1 answer
  • 61 divided by 5320<br><br><br> use compatible numbers to estimate the quotient
    14·2 answers
  • What is the nth term rule for the sequence -5, -7 -9 -11 -13​
    12·1 answer
  • HELP!! PLSS!! ON A TIMER!!
    14·1 answer
  • Line m has a slope of 8/5. line n is perpendicular to line m. what is the slope of line n?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!