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Vilka [71]
2 years ago
8

Question 2 of 10

Mathematics
1 answer:
Veronika [31]2 years ago
8 0

Answer:

D

Step-by-step explanation:

Use the general formula of quadratic equation:

x_{1,2}=\dfrac{-b \pm\sqrt{b^2-4ac}  }{2a} = \dfrac{6\pm\sqrt{36-40}}{4}=\dfrac{6\pm2i}{4} = \dfrac{3\pm i}{2}

Thus we choose D

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Please help! Will mark as brainliest!
Juliette [100K]

Answer:

C

Step-by-step explanation:

Use elimination by multiplying thw whole top equation by 2. (both sides)

then cancel out y and solve for x. plug back in to get y

please mark brainliest if you found this helpful

6 0
3 years ago
Read 2 more answers
You need to purchase supplies for the trip. You have $1000 to spend.
SCORPION-xisa [38]

Answer:

241.50

Step-by-step explanation:

Oxen= 40 x 2 = 80

Food=0.20 x 500 =100

Clothing = 10 x 5 = 50

total = 230

Tax= 5 percent x 230 divided by 100

= $11.50

230 +11.50

= 241.50

6 0
2 years ago
Lucas made the list of all his assets and liabilities below. Highlight each item in
KonstantinChe [14]

Answer:

I got 12,148.  Is that an option?

Step-by-step explanation:

98.00 checking account

car (value - outstanding balance) 12,500

plus jewelry $1750

4 0
3 years ago
Help me asap plss :,)
STatiana [176]
The answer would be 17. It’s a 90° angle and if you do 90-73, you get 17.
7 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
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