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bogdanovich [222]
3 years ago
11

Homework help!!!!!!!

Mathematics
1 answer:
GREYUIT [131]3 years ago
7 0

Answer:

r = -9

Step-by-step explanation:

the less the negative number is the more it is .

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The length of a rectangle is 3cm more than twice the width. The perimeter is 84 cm. Find the dimensions .
blsea [12.9K]

Width of the rectangle is 13 cm and length is 29 cm.

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

Step 1:

Given perimeter of the rectangle = 84 cm. Let the width be x, then the length of the rectangle = 2x + 3. Use the formula for perimeter of a rectangle = 2(length + width) to find the dimensions.

84 = 2(2x + 3 + x) = 2(3x + 3) = 6(x + 1) [taking 3 as common factor outside)

⇒ 84 = 6x + 6

⇒ 78 = 6x

∴ x = 13

⇒ Width of the rectangle = 13 cm

∴ Length of the rectangle = 2x + 3 = 29 cm

4 0
3 years ago
Which of the following equations describes the line shown below? Check all<br> that apply.
scoundrel [369]

Answer:

B. y = 2x - 2

E. y + 4 = 2(x + 1)

F. y - 6 = 2(x - 4)

Step-by-step explanation:

The equation of the line can be found using either the point-slope equation or the slope-intercept equation.

✔️Equation of the line in point-slope using the slope and the coordinates of the point (4, 6):

Slope = m = change in y/change in x

Using (4, 6) and (-1, -4),

m = (-4 - 6)/(-1 - 4)

m = -10/-5

m = 2

Substitute m = 2, and (a, b) = (4, 6) into the point-slope equation form y - b = m(x - a)

Thus:

y - 6 = 2(x - 4)

✔️Equation of the line in point-slope using the slope and the coordinates of the point (-1, -4):

Slope = m = 2

Substitute m = 2, and (a, b) = (-1, -4) into the point-slope equation form y - b = m(x - a)

Thus:

y - (-4) = 2(x - (-1))

y + 4 = 2(x + 1)

✔️Equation of the line in slope-intercept form, y = mx + b

Where,

m = slope = 2

b = y-intercept = -2 (the point where the line intercepts the y-axis)

Thus, substitute m = 2 and b = -2 into y = mx + b

y = 2x + (-2)

y = 2x - 2

6 0
3 years ago
The net of a square pyramid is shown:
lys-0071 [83]
1.7625 square inches
3 0
3 years ago
The figure below shows three quadrilaterals on a coordinate grid.
mars1129 [50]

Answer: Q and W are similar but not congruent


Step-by-step explanation:

From the given graph, The length of rectangle  Q= 5 units

and the width of rectangle Q=2 units

The length of rectangle  S= 5 units

and the width of rectangle S=2 units

Since the dimensions of rectangle Q is equals to the corresponding dimensions of the rectangle S and since all the angles of rectangle are right angles.

therefore, Q and S are similar and congruent  as they have the same shape and the same size.

But The length of rectangle  W= 10 units = 2 times length of Q

and the width of rectangle W=4 units= 2 times width of Q

Thus the dimensions of W is proportional to dimensions of Q.

Thus,  Q and W are similar but not congruent.



5 0
4 years ago
Read 2 more answers
The double number line show the ratio of feet to miles<br>how many feet are in 3 miles​
svetoff [14.1K]
There are 15,840 feet in 3 miles
8 0
3 years ago
Read 2 more answers
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