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3 years ago

HELP

Mathematics

1 answer:

Rus_ich [418]3 years ago

8 0

Answer:

It's Cos again.

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What is the answer? It says i should put it in the order and which one comes first

Rudik [331]

Answer:

B. -11

Step-by-step explanation:

ascending order means least to greatest.

-10, -9, -8, -7, -6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7,...

3, -1, $\sqrt{5}$ , 13, -11

-11 is the least number because it is the greatest negative number

8 0

3 years ago

A factor of 30 is chosen at random.

Liono4ka [1.6K]

Answer:

3/8 or 0.37

The factors of 30 are 1,2,3,5,6,10,15 and 30.

Two digits : 10,15 & 30

Probability = no.of favourable outcomes / total no.of trials

3/8 or 0.37

Have a nice day!!

8 0

3 years ago

Square root of 5 + square root of 3 the whole divided by sqaure root of 5 - square root of 3

xxMikexx [17]

Answer:

The answer is 4 + √15 .

Step-by-step explanation:

You have to get rid of surds in the denorminator by multiplying it with the opposite sign :

$\frac{ \sqrt{5} + \sqrt{3} }{ \sqrt{5} - \sqrt{3} }$

$= \frac{ \sqrt{5} + \sqrt{3} }{ \sqrt{5} - \sqrt{3} } \times \frac{ \sqrt{5} + \sqrt{3} }{ \sqrt{5} + \sqrt{3} }$

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

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

$= \frac{5 + 2 \sqrt{15} + 3 }{5 - 3}$

$= \frac{8 + 2 \sqrt{15} }{2}$

$= 4 + \sqrt{15}$

3 0

3 years ago

Inverse Function: f-¹ (- 3) f(x) = 6x - 12

sp2606 [1]

f(x) = 6x - 12
 y = 6x - 12
y + 12 = 6x - 12 + 12
y + 12 = 6x
 6 6
¹/₆y + 2 = x
 y = ¹/₆x + 2
 f⁻¹(x) = ¹/₆x + 2
f⁻¹(-3) = ¹/₆(-3) + 2
 f⁻¹(-3) = -¹/₂ + 2
 f⁻¹(-3) = 1¹/₂
(x, f⁻¹(x)) = (-3, 1¹/₂)

7 0

3 years ago

While watching a circus show, I counted out the number of acrobats and elephants. I counted 40 legs and 15 heads. How many acrob

Goryan [66]

Answer:

y=10 ( number of acrobat)

Step-by-step explanation:

let x be the elephant and y the acrobat

elephant has 4 legs and acrobat 2

4x+2y=40

x+y=15 ⇒x=15-y

substitute for x in the equation:

4(15-y)+2y=40

60-4y+2y=40

-2y=40-60

y=-20/-2

y=10 ( number of acrobat)

number of elephant=15-10=5 elephants

5 0

3 years ago