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natulia [17]
3 years ago
8

-2x + y=9 -4x - y=9 What is the answer

Mathematics
2 answers:
Fed [463]3 years ago
7 0

Answer:

-6x = 18

x = -3

-2(-3) + y = 9

6 + y = 9

y = 3

(-3, 3)

Step-by-step explanation:

Dmitry_Shevchenko [17]3 years ago
3 0

-2x + y = 9

-4x - y = 9

----------------- +

-6x = 18

x = -3

-2x + y = 9

-2(-3) + y = 9

6 + y = 9

y = 3

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Use formulas to find the lateral area and surface area of the given prism. Round your answer to the nearest whole number. The fi
mel-nik [20]

Answer:

Lateral Surface Area = 472 m²

Total Surface Area = 486m²

Step-by-step explanation:

The above prism is a Triangular prism

a) Lateral Surface Area = Perimeter of the Base × H

H = 29m

Perimeter of the Base = (7m + 7.28m + 2m)

= 16.28m

Lateral Surface Area = 16.28m × 29m

= 472.12 m²

Approximately to the nearest whole number = 472 m²

b) Total Surface Area

Triangular prism =

2 Triangles and 3 Rectangles

1st Triangle = 1/2 × base × Height

= 1/2 × 2m × 7m

= 7m²

2nd Triangle = 1/2 × base × height

= 1/2 × 2m × 7m

= 7m²

1st Rectangle = Length × Width

= 29m × 2m = 58m²

2nd Rectangle =

Length × Width

= 29m × 7.28m = 211.12m²

Length × Width

= 29m × 7m = 203m²

Total surface area = 7m² + 7m² + 58m² + 211.12m² + 203m²

= 486.12m²

Approximately to the nearest whole number = 486 m²

Option A is the correct option

6 0
3 years ago
Please help me with this!!
s2008m [1.1K]

Answer:

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5 0
3 years ago
Nate runs 5 miles 8 miles each week. Write an expression for the number of miles he runs in N weeks. Find the number of miles Na
777dan777 [17]

Answer:

?=200

Step-by-step explanation:

5*8=40

40*5=?

8 0
3 years ago
(time limit!) what is the volume below?<br><br>A) 112 <br>B) 224 <br>C) 784 <br>D) 896
Radda [10]
To find a volume of a cylinder we use the following formula:
v = \pi {r}^{2} h
Plug in the values:

v = \pi \times  {8}^{2}  \times 14
Take the square:
v = \pi \times 64 \times 14
Multiply the numbers:
v =896 \pi {m}^{2}
8 0
3 years ago
HeLp!!
erica [24]

Answer:

C

Step-by-step explanation:

A constant correlation is essentially when the points on a scatter plot do not show any type of pattern or correlation; the points are literally scattered rather randomly, which would cause the graph to neither increase nor decrease.

Meanwhile, a positive correlation means that the points on the plot follow a line with a positive slope. In other words, it increases to the right.

Thus, the answer is C.

Hope this helps!

4 0
3 years ago
Read 2 more answers
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