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Ratling [72]
3 years ago
11

Help pls i need help on this last math area equation. and explain also.

Mathematics
2 answers:
Hunter-Best [27]3 years ago
6 0
The answer is C)48 square cm , because to find the area of 1 rectangle you have to first multiply 5x2=10 which there are 4 rectangles so you multiply 10 by 4 which gives you 40, next you look at the small squares the lines show that the each side equivalent so to find the area you do 2x2 which gives you 4 and if you have 2 squares it will give you 8 then you add that to the 40 from the rectangles which gives you 48. I hope this helped :))
BlackZzzverrR [31]3 years ago
5 0

Answer:

c

Step-by-step explanation:c

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WILL MARK BRAINLIEST TO FIRST CORRECT ANSWER
evablogger [386]

Answer:

{(-1, 8), (0, 5), (2, -1), (3, -4)}

Step-by-step explanation:

I used a calculator, pls let me know if im incorrect

3 0
3 years ago
Kaliska is jumping rope. The vertical height of the center of her rope off the ground R(t) (in cm) as a function of time t (in s
xz_007 [3.2K]

Answer:

R (t) = 60 - 60 cos (6t)

Step-by-step explanation:

Given that:

R(t) = acos (bt) + d

at t= 0

R(0) = 0

0 = acos (0) + d

a + d = 0 ----- (1)

After \dfrac{\pi}{12} seconds it reaches a height of 60 cm from the ground.

i.e

R ( \dfrac{\pi}{12}) = 60

60 = acos (\dfrac{b \pi}{12}) +d --- (2)

Recall from the question that:

At t = 0, R(0) = 0 which is the minimum

as such it is only  when a is  negative can acos (bt ) + d can get to minimum at t= 0

Similarly; 60 × 2 = maximum

R'(t) = -ab sin (bt) =0

bt = k π

here;

k  is the integer

making t the subject of the formula, we have:

t = \dfrac{k \pi}{b}

replacing the derived equation of k into R(t) = acos (bt) + d

R (\dfrac{k \pi}{b}) = d+a cos (k \pi) = \left \{ {{a+d  \ for \ k \ odd} \atop {-a+d \ for k \ even}} \right.

Since we known a < 0 (negative)

then d-a will be maximum

d-a = 60  × 2

d-a = 120 ----- (3)

Relating to equation (1) and (3)

a = -60 and d = 60

∴ R(t) = 60 - 60 cos (bt)

Similarly;

For R ( \dfrac{\pi}{12})

R ( \dfrac{\pi}{12}) = 60 -60 \ cos (\dfrac{\pi b}{12}) =60

where ;

cos (\dfrac{\pi b}{12}) =0

Then b = 6

∴

R (t) = 60 - 60 cos (6t)

7 0
3 years ago
Please help I will give 10 pt
Mrac [35]

The expressions 100×10 and the more complicated

(100 - 4a)(10 + a)

are calculating annual (expected) revenue.  In 100×10 the 100 is the number of decks and the 10 is the price per deck.  In (100 - 4a)(10 + a) the 100-4a is the number of decks and the 10+a is the price per deck.  So a must be the amount the price increases.

Answer: amount of price increase, last choice

4 0
3 years ago
Read 2 more answers
Write each missing number (2+4)+5=2+(?+5)
lara [203]
? is equal to 4 because you can cancel out the 2 and the 5 from both sides and you are left with 4.
3 0
2 years ago
Read 2 more answers
PLEASE ANSWER FAST
Nina [5.8K]

Answer:

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Step-by-step explanation:

hope this helps!

6 0
3 years ago
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