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mart [117]
3 years ago
8

What is the answer???

Mathematics
1 answer:
muminat3 years ago
5 0

Answer:

21, 15

Step-by-step explanation:

12+9=21

the third side of a triangle must be equal to the two other sides added up to make it possible

also 15 if you're trying to make a possible right triangle

You might be interested in
Someone please help me with 6 and 7 and please show work
kap26 [50]
6 would be $240.

Take 6,000 and multiply it by 4% which means you need to convert 4% to a decimal.
4% as a decimal is 0.04. 6,000 x 0.04 equals 240.

hope this is correct and sorry but I do not understand how to do 7.
4 0
4 years ago
Perimeter, Area And Volume
san4es73 [151]

Answer:

A ≈ 1900.7 m²

Step-by-step explanation:

The area (A) of the race track is

area of outer circle - area of inner circle

= πR² - πr²

= π × 63² - π × 58²

= π (63² - 58² )

= π(3969 - 3364)

= π × 605

≈ 1900.7 m² ( to 1 dec. place )

6 0
3 years ago
Read 2 more answers
Sarah will ship packages for anyone. She charges $6 for her services and then $2.75 per item. How much would she charge to ship
Anastaziya [24]
The answer would be 70 6•8=48 2.75•8=22 and 48+22=70
8 0
2 years ago
If 3a= -9 ab = 15. What's the value of b
AlekseyPX

Answer:

b = -5

Step-by-step explanation:

So we know

3<em>a</em> = -9

Divide 3 on both sides

<em>a</em> = -3

Plug <em>a</em> in to the other equation

-3b = 15

divide -3 on both sides

b = -5

3 0
4 years ago
It is known that x1 and x2 are roots of the equation 3x^2+2x+k=0, where 2x1=−3x2. Find k.
miss Akunina [59]

Answer:

k = 8

Step-by-step explanation:

Since the roots of the equation 3x² + 2x + k are x₁ and x₂ and 2x₁ = 3x₂.

By the roots of an equation, ax² + bx + c , where its roots are  x₁ and x₂. It follows that sum of roots are x₁ + x₂ = -b/a and product of roots are x₁x₂ = c/a.

Comparing both equations, a = 3 b = 2 and c = k.

So, x₁ + x₂ = -b/a = -2/3 and x₁x₂ = c/a = k/3

x₁ + x₂ = -2/3 and x₁x₂ = k/3

3x₁ + 3x₂ = -2 (1) and 3x₁x₂ = k  (2)

Since 2x₁ = -3x₂, and -2x₁ = 3x₂substituting this into equations (1) and (2) above, we have

3x₁ + 3x₂ = -2 (1) and 3x₁x₂ = k  (2)

3x₁ + (-2x₁) = -2  and x₁(3x₂) = k

3x₁ - 2x₁ = -2  and x₁(3x₂) = k  

x₁ = -2  and x₁(-2x₁) = k  

x₁ = -2  and -2x₁² = k  

Substituting x₁ = -2 into -2x₁² = k, we have

-2x₁² = k

-2(-2)² = k

2(4) = k

8 = k

So, k = 8

7 0
4 years ago
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