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2 years ago

12

Finding the area of a triangle

1 answer:

xz_007 [3.2K]2 years ago

7 0

Answer:

Step-by-step explanation:

The height of the triangle is 4

and the base is 8

Area of a triangle is BH/2

Therefore the area is 16

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Which two values of x are roots of the polynomial below?

Julli [10]

Answer:

B. and C.

Step-by-step explanation:

1. Set the polynomial equal to zero:

x² + 5x + 7 = 0

2. Plug the given values of a, b, and c into the quadratic formula:

$x=\frac{-5+-\sqrt{5^{2}-4(1)(7) } }{2(1)}$

3. Solve the square root:

$x=\frac{-5+-\sqrt{25-4(1)(7)} }{2(1)}$

$x=\frac{-5+-\sqrt{25-28} }{2(1)}$

$x=\frac{-5+-\sqrt{-3} }{2(1)}$

4. Simplify the rest:

$x=\frac{-5+-\sqrt{-3} }{2}$

5. Separate the solutions:

$x=\frac{-5+\sqrt{-3} }{2} , x=\frac{-5-\sqrt{-3} }{2}$

Thus, options B and C are the answers.

hope this helps!

4 0

2 years ago

Could someone please help me solve this?

ryzh [129]

Answer:

40

Step-by-step explanation:

(2/5)*n - 6 = 10 Add 6 to both sides

(2/5)*n - 6 + 6 = 10 + 6 Combine

(2/5)*n = 16 Multiply both sides by 5/2

(5/2)(2/5)n = 16*(5/2)

n = 80 / 2

n = 40

6 0

2 years ago

Write as a fraction. Reduce fractions. Use the "/" key for the fraction bar.<br><br> 37.5%

Tems11 [23]

That would be 3/8
Because 1/8 = 12.5 %

3 0

3 years ago

A bag has ten marbles in it.Three of them are green one of them is red four of them are yellow and two of them are blue.If one m

nikitadnepr [17]

I’m pretty sure the answer would be d

4 0

2 years ago

Can someone help me picture inserted

densk [106]

Answer:

~77°

Step-by-step explanation:

cosQ = 9/40

inverse cosine(9/40) ≈ 77° = Q

7 0

2 years ago

Read 2 more answers