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Mila [183]
3 years ago
9

Geometry student reference sheet

Mathematics
1 answer:
lina2011 [118]3 years ago
3 0

Answer:

i am so sorry but i need points a=5

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If f(x) varies directly with x and f(x) = 40 when x = 8, find the value of f(x) when x = 2.
Vsevolod [243]

Answer:

f(x) = 10

Step-by-step explanation:

for direct variation

f(x) = kx

substitute in for f(x) and x

40 = k*8

solve for k

40/8 = k*8/8

5 =k

now we have

f(x) = 5*x

let x=2

f(x) = 5*2

f(x) = 10


4 0
4 years ago
Read 2 more answers
Which algebraic expression is equivalent to the expression below? 6x+15y A. 3(2x - 5y) B. 3(5x - 2y) C. 3(2x + 5y) D. 3(5x + 2y)
Marina CMI [18]

Answer:

C. 3(2x + 5y) is the algebraic expression equivalent to the expression

Step-by-step explanation:

From the question, the given expression is 6x + 15y.

Factorizing this expression gives 3(2x + 5y). Hence, the algebraic expression equivalent to the expression 6x + 15y is 3(2x + 5y). (Option C).

Checking the remaining options

A. 3(2x - 5y)

Expanding this gives 6x - 15y. It is not equivalent to the given expression

B. 3(5x - 2y)

Expanding this gives 15x - 6y. It is not equivalent to the given expression

D. 3(5x + 2y)

Expanding this gives 15x + 3y. It is not equivalent to the given expression.

Hence, C. 3(2x + 5y) is the algebraic expression equivalent to the expression.

3 0
3 years ago
Using a calculator, or otherwise calculate the exact value of 1 4/7 + 2/3 - 1 5/6​
gladu [14]

Answer:

1/6

Step-by-step explanation:

i used a calculator

5 0
3 years ago
I NEED HELP PLEASE Which is the better buy?
Vladimir79 [104]

Answer: The second one, 10 rolls for $12. 1.29 (Rounded)

Step-by-step explanation:

14/18 is 1.29 (Rounded)

10/12 is 1.20.

The unit rate is cheaper, therefore making it the better buy

6 0
3 years ago
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If you know the area and the base of a triangle, how can you find the height? Use the drop?down menus to explain your answer.
Vikki [24]

Answer:

h = \frac{2A}{b}

Step-by-step explanation:

Area (A) of a triangle = \frac{1}{2} × base (b) × height (h)

i.e A = \frac{1}{2}bh

h = \frac{2A}{b}

5 0
4 years ago
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