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3 years ago

The questions are in the pictures:)

Mathematics

1 answer:

JulsSmile [24]3 years ago

7 0

Answer:

4.75 to 7.5

Step-by-step explanation:

just look at it or use a pencil to draw lines to proportion

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Why is estimating products of fractions useful

iren [92.7K]

This is useful so that you can come up with a quick answer rather then sit down with paper to solve the whole problem.

5 0

3 years ago

the area of a right triangle is 77 m^2. the hypotenuse has a length of √317 m. what is the length of the legs?

Alexxandr [17]

Answer:

11 m and 14 m

Step-by-step explanation:

Legs: x and y

---

1/2xy= 77 ⇒ xy= 154

√x²+y²= √317 ⇒ x²+y²=317

x²+y²+2xy= (x+y)²= 2*154+317= 625 ⇒ x+y= √625= 25

x= 25-y

xy=154 ⇒ y(25-y)= 154 ⇒ 25y- y²=154 ⇒ y²- 25y +154=0 ⇒ y=11 and y=14

x= 25-y= 14 and 11

4 0

4 years ago

How many square meters is the area of a square field with a side of 400 cm?

mr_godi [17]

Answer:

Easy think, a square has 4 equal sides and if each side is 400 just multiply 400 x 4 = 1600

Step-by-step explanation:

hope this helps

8 0

3 years ago

Find the surface area

Semmy [17]

Answer:

The surface area is $198.75\ ft^2$

Step-by-step explanation:

Step 1: Determine the area of the bottom

$A = s^2$

$A = (7.5\ ft)^2$

$A = 56.25\ ft^2$

Step 2: Determine the area of the triangles

$A = \frac{h * b}{2}$

$A = \frac{9.5\ ft * \frac{7.5\ ft}{2}}{2}$

$A=\frac{9.5\ ft*3.75\ ft}{2}$

$A = 17.8125\ ft^2$

There are two of these right triangles on every side which means that we have 8 of these triangles so we multiply the area that we got by 8.

$A = 17.8125\ ft^2 * 8$

$A=142.5\ ft^2$

Step 3: Combine the area to get the surface area

$A_{total}=56.25\ ft^2+142.5\ ft^2$

$A_{total}=198.75\ ft^2$

Answer: The surface area is $198.75\ ft^2$

6 0

3 years ago

it takes one printer, working alone, 9 h longer to print a payroll than it takes a second printer. working together, the printer

Lelechka [254]

Answer:

7.5 Hours (This is questioned weird though so it could be different)

Step-by-step explanation:

Just add 9 to 6 and you'll have 15 divided by two equals 7.5.

Or since it takes 6 hours for both, multiply by 2 equals 12

7 0

3 years ago