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3 years ago

What is 3 1/4 +( 3 1/4 +5 1/5)?

Mathematics

2 answers:

Yuliya22 [10]3 years ago

7 0

Answer:

11 7/10

Step-by-step explanation:

Lets make the fractions into common denominators, by mulitplying 4 by 5 and 5 by 4 (see below) and follow PEMDAS

3 1/4(5) +(3 1/4(5) + 5 1/5(4))

3 5/20+ (3 5/20+5 4/20)

Simplify like terms

3 5/20+ (8 9/20)

11 14/20

Simplify fraction

11 7/10

monitta3 years ago

3 0

Answer:16.5

Step-by-step explanation:

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When the side of a square is decreased in length by 1 foot, its area is 8 ft2. The length of a side of the square is 1 + 2.

NemiM [27]

Answer:TRUE

Step-by-step explanation:

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3 years ago

The area of a rectangle is 70 m², and the length of the rectangle is 11 m less than three times the width. Find the dimensions o

11111nata11111 [884]

Step-by-step explanation:

the area of a rectangle is

length × width

in our case

length × width = 70 m²

length = 3×width - 11

we can use this second equation in the first and get

(3×width - 11) × width = 70

3×width² - 11×width - 70 = 0

the general solution to a quadratic equation is

x = (-b ± sqrt(b² - 4ac))/(2a)

in our case

a = 3

b = -11

c = -70

x = (11 ± sqrt((-11)² - 4×3×-70))/(2×3) =

= (11 ± sqrt(121 + 840))/6 =

= (11 ± sqrt(961))/6

x1 = (11 + 31)/6 = 42/6 = 7

x2 = (11 - 31)/6 = -20/6 = -10/3

the negative solution is not applicable for a length in an object.

so, only x1 = 7 m is our solution.

the width of the rectangle is 7 m.

the length = 3×width - 11 = 3×7 - 11 = 21-11 = 10 m

7 0

2 years ago

Solve -4x^2 + 6x - 10 = 0 using the quadratic formula. Show each step.

Musya8 [376]

-12x-10=0 since the X can't combine with non X numbers

5 0

3 years ago

Find the measure of Angle R to the nearest tenth. a. 63.8 degrees b. 67.2 degrees c. 70.9 degrees d. 61.5 degrees

Vikki [24]

The complete question in the attached figure

we know that
tan R°=opposite side angle R/adjacent side angle R
opposite side angle R=72 units
adjacent side angle R=25 units
so
tan R°=72/25
R=arc tan (72/25)---------> R=70.85°-------> R=70.9°

the answer is
R=70.9°

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3 years ago

you are riding your bike. At 10:04am you have riddden your bike 23 miles. By 10:17am you have ridden 179 miles. Find the rate of

Doss [256]

The answer is 720 mph, since we make time the x and distance y. We use the slope formula (y2 - y1)/(x2 - x1)

(179-23)/(17-4)

156 miles/13 mins

12 miles per min

Since the answer is in hours instead of minutes, we multiply 12 by 60 to get 720 mph

6 0

3 years ago

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