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3 years ago

Need help urgently!!!!!

Mathematics

1 answer:

Alecsey [184]3 years ago

5 0

Answer:

I dont really know

Step-by-step explanation:

use a calculator

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7. Which dimensions result in the minimum perimeter for a rectangle with area 42.0 cm2?

natali 33 [55]

9514 1404 393

Answer:

7. d. l = 6.48 cm, w = 6.48 cm

8. d. square

Step-by-step explanation:

For a given area, the perimeter can always be shortened by reducing the length of the long side and increasing the length of the short side. When you get to the point where you can't do that, then you have the minimum perimeter. You will reach that point when the sides are the same length: the rectangle is a square.

7. In light of the above, the best dimensions are √42 ≈ 6.48 cm for length and width.

8. In light of the above, the shape is a square.

_____

The attached graph shows the length of one side (x) and the associated perimeter. The other side is 42/x, which will also be 6.48.

8 0

3 years ago

What is the slope of the line that passes through the points (10, -6)(10,−6)

BARSIC [14]

Answer:

Undefined

Step-by-step explanation:

The formula for slope is $m=\frac{y2-y1}{x2-x1}$

So use the x's and y's from the given points to solve for the slope

(10, -6) (10, -6)

$m=\frac{-6 - (-6)}{10-10}$

$m=\frac{0}{0}$

The slope for this line would be undefined because a number cannot be divided by 0

5 0

3 years ago

One number is twice another number.

Elena L [17]

20 and 14

Explanation:
Let the larger number be
x

Then the smaller number will be
x
−
6

Three times the smaller number is
3
(
x
−
6
)
, which is equal to two more than twice the other number which is
2
x
+
2

So,
→
3
(
x
−
6
)
=
2
x
+
2

Use the distributive property
a
(
b
+
c
)
=
a
b
+
a
c

→
3
x
−
18
=
2
x
+
2

Add
18
both sides
→
3
x
=
2
x
+
20

Subtract
2
x
both sides
⇒
x
=
20

We know that the larger number is
20

So, the smaller number is
20
−
6
=
14

5 0

3 years ago

WILL CHOOSE BRAINLIEST PLZ HELP!

mario62 [17]

Answer:

R'(-1,3) , S'(0,2) , T'(-1,1), U'(-3,1)

Step-by-step explanation:

To find the vertices of a point after a dilation simply multiply the x and y values of each given coordinate by the scale factor.

So to find the vertices of Trapezoid RSTU after a dilation centered at the origin with a scale factor of 1/5 we would multiply the x and y values of the given coordinates of Trapezoid RSTU by 1/5.

Given Coordinates: R(-5, 15), S(0, 10), T(-5, 5) and U(-15, 5)

Scale Factor: 1/5

R(-5, 15) -----> ( -5 * 1/5 = -1 , 15 * 1/5 = 3 ) -----> (-1,3)

S(0,10) -----> ( 0 * 1/5 = 0 , 10 * 1/5 = 2 ) -----> (0,2)

T(-5,5) -----> ( -5 * 1/5 = -1 , 5 * 1/5 = 1 ) -----> (-1,1)

U(-15,5) -----> (-15 * 1/5 = -3 , 5 * 1/5 = 1 ) -----> (-3,1)

So the coordinates of Trapezoid RSTU after a dilation with a scale factor of 1/5 are R'(-1,3) , S'(0,2) , T'(-1,1), U'(-3,1)

Refer to the attached image for more validation

4 0

3 years ago

Read 2 more answers

Francine use her computer for 2 1/8 hours Tuesday evening and for 2 1/4 hours on Wednesday evening. Which is the best estimate o

borishaifa [10]

C. About 4 hours. When you add the numbers together, you get

2 1/8 + 2 1/4 = 35/8 = 4 3/8 = 4.375

Since the answer is not greater than 4.5, you round down to 4. If the answer was greater than 4.5, you would have rounded up to 5.

8 0

3 years ago