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sleet_krkn [62]
3 years ago
12

Given the system of equations, match the following items. x + 2y = 7 x - 2y = -1 y determinant 2. x determinant 3. system determ

inant
Mathematics
2 answers:
Veseljchak [2.6K]3 years ago
8 0

Answer:

y determinant is 3

x determinant  is 2

system determinant is 1

soldier1979 [14.2K]3 years ago
6 0

Answer:

x=3

y = 2

Solution is (3,2)

Step-by-step explanation:

x + 2y = 7

x - 2y = -1

Solve the system of equations by elimination method

LEts add both equations

x + 2y = 7

x - 2y = -1

------------------

2x +0 = 6

2x = 6

Divide both sides by 2

x= 3

Now plug in x=3 in first equation

x + 2y = 7

3 + 2y = 7

subtract 3 from both sides

2y = 4

divide both sides by 24

y = 2

Solution is (3,2)

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ratelena [41]

Answer:

B

Step-by-step explanation:

8 0
3 years ago
Type the correct answer in each box. If necessary, round your answers to the nearest hundredth.
disa [49]

Answer:

Perimeter = 32.44 units

Area = 30 square units

Step-by-step explanation:

Given

Vertices

A(2,8), B(16,2) and C(6,2)

WE have to determine the lengths of all sides before finding the perimeter and area.

The formula of modulus is:

d = \sqrt{(x_{2}- x_{1})^{2} +(y_{2}-y_{1})^{2}}\\AB=\sqrt{(16-2)^{2} +(2-8)^{2}}\\=\sqrt{(14)^{2} +(-6)^{2}}\\=\sqrt{196+36}\\ =\sqrt{232}\\=15.23\\\\BC=\sqrt{(6-16)^{2} +(2-2)^{2}}\\=\sqrt{(-10)^{2} +(0)^{2}}\\=\sqrt{100+0}\\ =\sqrt{100}\\=10\\\\AC=\sqrt{(6-2)^{2} +(2-8)^{2}}\\=\sqrt{(4)^{2} +(-6)^{2}}\\=\sqrt{16+36}\\ =\sqrt{52}\\=7.21\\\\

So the perimeter is:

Perimeter=AB+BC+AC\\=15.23+10+7.21\\=32.44\ units

Using hero's formula,

s=\frac{perimeter}{2}\\s=\frac{32.44}{2}\\ s=16.22\\Area=\sqrt{s(s-a)(s-b)(s-c)}\\=\sqrt{16.22(16.22-15.23)(16.22-10)(16.22-7.21)}\\=\sqrt{(16.22)(0.99)(6.22)(9.01)}\\=\sqrt{899.91}\\=29.99\ square\ units

Rounding off will give us 30 square units ..

4 0
3 years ago
Please solve my question ​
Rina8888 [55]

Answer:

u should redder the reader about the

formulas as it is a direct question

6 0
3 years ago
Read 2 more answers
HELPP ILL HIVE BRAINLIEST
UkoKoshka [18]

Answer:

part a: two is the y intercept because the line intercepts at two on the y-axis

part b: i don't know but gl

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2 years ago
What is the area of this trapezoid?<br><br> 26 cm²<br><br> 32 cm²<br><br> 40 cm²<br><br> 72 cm²
KonstantinChe [14]

Answer:

area = 26 m²

Step-by-step explanation:

4x5 = 20

3x4x0.5 = 7.5

20 + 6 = 26 m²

7 0
2 years ago
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