All categories

2 years ago

Please help

Mathematics

2 answers:

harkovskaia [24]2 years ago

3 0

Answer:

Sergio's strategy was to multiply the sum of the length and width of the rectangle by 2. This was one correct way to find the perimeter of the rectangle.

Jamie's strategy was to add the given measurements of the length and width of the rectangle together. This was another correct way to find the perimeter of the rectangle.

Karina's strategy was to multiply the given length of the rectangle by 2 and add this product to the width of the rectangle. This was NOT a correct way to find the perimeter of the rectangle, as it did not follow the formulas to finding the perimeter of a rectangle: l + w + l + w, or 2(l + w) and furthermore formulas that explain the same thing. Karina only multiplied the length by 2 and did not account for the width of the retangle which she should have done as well.

Ethan's strategy was to multiply the width by 2, multiply the length by 2, and add these two products together to find the perimenter. This final strategy was correct, and can be used to find the perimeter of the rectangle.

Hope this helps you! I love doing math, so enjoy!

Lubov Fominskaja [6]2 years ago

3 0

Answer:

What the other person said

Step-by-step explanation:

You might be interested in

What correlations can you use when one or more of the variables are measured on an ordinal scale?

larisa [96]

HEY

For variables at ordinal level use Spearman's correlation. However, Chi-Square is also suitable to use for test of significance with cross tabulation of ordinal level data

thank me later

carryonlearing

✨ jufaith ✨

4 0

2 years ago

Please help me i will give brainlest please i need help

sweet-ann [11.9K]

Answer:

Since you didn't mention which question.

Step-by-step explanation:

13.

$1.\overline{52}\\$ = 1.525252...

Let x = 1.525252...

10x = 15.2525252....

100x = 152.525252...

100x - x = 151.00

99x = 151

$x = \frac{151}{99}\\\\or\\\\x = 1 \frac{52}{99}$

14.

4x + 10 = 8x - 26 [ corresponding angles are congruent ]

4x - 8x = - 26 - 10

- 4x = - 36

$x = \frac{-36}{-4} \\\\x = 9$

15.

Given breadth of a rectangle is ( 2/3) its length.

Let the length be x

Therefore, breadth = ( 2 /3) of x

$= \frac{2}{3} \times x\\\\=\frac{2}{3}x$

Given perimeter = 40m

Perimeter of a rectangle = 2( length + breadth)

$40 = 2 (x + \frac{2}{3}x )\\\\\frac{40}{2} = \frac{2}{2}(x + \frac{2}{3}x)\\\\20 = x + \frac{2}{3}x\\\\20 = \frac{3x + 2x}{3}\\\\20 \times 3 = 5x \\\\x = \frac{60}{5}\\\\x = 12\\\\Therefore, Length = x = 12 \ m \ and \ breadth = \frac{2}{3}x = \frac{2}{3} \times 12 = 8 \ m$

16.

Sum of the angles of a triangle = 180°

Given ratio = 2 : 3 : 4

Sum of the ratio = 9

Therefore,

$first \ angle = \frac{2}{9} \times 180 = 2 \times 20 = 40 ^\circ\\\\Second \ angle = \frac{3}{9} \times 180 = 3 \times 20 = 60^\circ\\\\Third angle = \frac{4}{9} \times 180 = 4 \times 20 = 80^\circ$

17.

Sum of interior angles of a polygon with n sides = ( n - 2) x 180°

Given polygon is pentagon, that is n = 5

Therefore, sum of the interior angles = ( 5 - 2) x 180 = 3 x 180 = 540°

That is ,

x + 125 + 125 + 88 + 60 = 540°

x + 398 = 540°

x = 540 - 398

x = 142°

7 0

3 years ago

Read 2 more answers

Which set of transformations have been performed on triangle ABC to form triangle A′B′C′? (1 point)

Murrr4er [49]

Answer:

The answer is dilation by a scale factor of 2 followed by reflection about the y- axis.

Step-by-step explanation:

3 0

3 years ago

How do you find the area of something if you are given three different numbers?

Mice21 [21]

First notice that we are finding the area of the trapezoid.
The area of a trapezoid is:
$\frac{1}{2}h(b_1 + b_2)$ ,
where h is the height, b₁ and b₂ being the bases of the trapezoid.
But before we find the area we have to find the side length of the third side in the triangle. To find this, we need to use the Pythagorean Theorem.
$a^{2} +b^{2} = c^{2}$
$(3.3)^{2} + b^{2} = (3.6)^{2}$
When we solve this equation, we obtain 1.4387, which I will round to 1.4.
Now, we use the area formula. The side length of the bottom base is 1.4 + 7 = 8.4.
Plugging into the formula we get: $\frac{1}{2}(3.3)(8.4 + 1.8) = 16.83$

4 0

4 years ago

What is 1/25 as a percent

Anna007 [38]

Simple,
divide 1 by 25
$\frac{1}{25}$
when done correctly it is..
0.04 as a decimal.

0.04*100

=40%

6 0

4 years ago

Read 2 more answers