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3 years ago

Select the correct difference. -3z 7 - (-5z 7) 2z7 8z14 -2z7 2z

Mathematics

2 answers:

timofeeve [1]3 years ago

6 0

-3z^7 - (-5z^7) = -3z^7 + 5z^7 = 2z^7

Sloan [31]3 years ago

3 0

Answer:

$2z^{7})$ .

Step-by-step explanation:

Given : $-3 z^{7} - ( -5 z^{7})$

To find : Select the correct difference.

Solution : we have given

$-3 z^{7} - ( -5 z^{7})$ .

Open the parenthesis

$-3 z^{7} + 5 z^{7})$ .

By the rule ( + - = -) .

$2z^{7})$ .

Therefore, $2z^{7})$ .

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2. Match the shapes given to their correct areas.

aliina [53]

Applying the formula for each identified shape that are given, the correct areas to each shape are:

a. Square = 134.6 sq. yd

b. Circle = 452.2 sq. cm

c. Parallelogram = 40.6 sq. cm

d. Rectangle = 43.2 sq. ft

e. Trapezium = 25.7 sq. m

f. Triangle = 21.6 sq. ft

a. The shape given is a square.

Area of the square = $s^2$

Where,

s = 11.6 yd

Plug in the value of s

Area of the square = $11.6^2 = 134.6 $ yd^2$

b. The shape given is a circle.

Area of the circle = $\pi r^2$

Where,

r = 12 cm

Plug in the value of r

Area of the square = $\pi \times 12^2 = 452.2 $ cm^2$

c. The shape given is a parallelogram.

Area of the parallelogram = $bh$

Where,

b = 7 cm

h = 5.8 cm

Plug in the value of b and h

Area of the parallelogram = $7 \times 5.8 = 40.6 $ cm^2$

d. The shape given is a rectangle.

Area of the rectangle = $l \times w$

Where,

l = 8.3 ft

w = 5.2 ft

Plug in the value of l and w

Area of the rectangle = $8.3 \times 5.2 = 43.2 $ ft^2$

e. The shape given is a trapezium.

Area of the trapezium = $\frac{1}{2} (a + b) \times h$

Where,

a = 2.8 m

b = 10.4 m

h = 3.9 m

Plug in the value of a, b, and h

Area of the trapezium = $\frac{1}{2}(2.8 + 10.4) \times 3.9 = 25.7 $ m^2$

f. The shape given is a triangle. (See attachment for the shape).

Area of the triangle = $\frac{1}{2} \times b \times h$

Where,

b = 9 ft

h = 4.8 ft

Plug in the value of b, and h

Area of the triangle = $\frac{1}{2} \times 9 \times 4.8 = 21.6 $ ft^2$

Therefore, applying the formula for each identified shape that are given, the correct areas to each shape are:

a. Square = 134.6 sq. yd

b. Circle = 452.2 sq. cm

c. Parallelogram = 40.6 sq. cm

d. Rectangle = 43.2 sq. ft

e. Trapezium = 25.7 sq. m

f. Triangle = 21.6 sq. ft

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5 0

2 years ago

Which is the best linear model for the data shown in the scatter plot?

Studentka2010 [4]

The best linear model for the data that's illustrated will be y = 10x + 5

<h3>What is a linear model?</h3>

It should be noted that a linear model simply means model where the terms are added. It should be noted that this can be used in connection with the regression model.

Here, the best linear model for the data will be:

= (10 × x) + 5

= 10x + 5

Therefore, the best linear model for the data that's illustrated will be y = 10x + 5.

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3 0

1 year ago

16x16+14-99x8= First to get it right gets my hulu account NO CHEATING WITH A CACULATOR

vova2212 [387]

Answer:

16x16+14−99x8

=16x16+14+−99x8

Answer- =16x16−99x8+14

sooo its -522

Step-by-step explanation:

hope this helps! :)

5 0

3 years ago

Read 2 more answers

What is the value of x in 5x - 7 = y, if y =8

quester [9]

<h3>Answer: x = 3</h3>

To get that answer, we replace y with 8 and then isolate x.

5x-7 = y

5x-7 = 8

5x = 8+7

5x = 15

x = 15/5

x = 3

3 0

2 years ago

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Which ordered pair is the solution to the system of equations?

postnew [5]

So first solve for x and y
add the 2 equations together

2x+x+y-y=-8-4
3x=-12
divide by 3
x=-4
subsitute
-4-y=-4
addd 4 to both sdies
-y=0

the solution is (x,y) (-4,0) or D

7 0

3 years ago

Read 2 more answers