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m_a_m_a [10]
4 years ago
5

Want is the expression in the words 9×(8+4)

Mathematics
1 answer:
solmaris [256]4 years ago
5 0
It would be "Nine times parentheses eight plus four"
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Carlos is saving money to buy a new Nintendo Switch game. He has $25. After he receives his allowance (n), he will have $45. Whi
irga5000 [103]

Answer He needs to wait to get his allowance twice.

Step-by-step explanation:

The average price of a game is around 45$. If Carlos gets 25$ a week its only 2 weeks to get a game. in other words: 2x25: 45

6 0
4 years ago
A farmer with 650 ft of fencing wants to enclose a rectangular area and then divide it into four pens with fencing parallel to o
vichka [17]

Answer:

Step-by-step explanation:

chect attachment for step by step details. attachment 2 is the (b) part of the question.

4 0
4 years ago
What are the exact values of sin(2π3radians) and cos(2π3radians)
topjm [15]
We know that
2π/3 radians-------> convert to degrees-----> 2*180/3---> 120°
120°=90°+30°

Part a) Find <span>sin(2π/3)
</span>sin(2π/3)=sin (90°+30°)
we know that
sin (A+B)=sin A*cos B+cos A*sin B
so
sin (90°+30°)=sin 90*cos 30+cos 90*sin 30
sin 90=1
cos 30=√3/2
cos 90=0
sin 30=1/2
sin (90°+30°)=1*√3/2+0*1/2-----> √3/2

the answer part a) is
sin(2π/3)=√3/2

Part b) Find cos (2π/3)
cos (2π/3)=cos (90°+30°)
we know that
cos (A+B)=cos A*cos B-sin A*sin B
so
cos (90°+30°)=cos 90*cos 30-sin 90*sin 30
sin 90=1
cos 30=√3/2
cos 90=0
sin 30=1/2
cos (90°+30°)=0*√3/2-1*1/2----> -1/2

the answer part b) is
cos (2π/3)=-1/2


4 0
3 years ago
Jenny collects seashells and interesting rocks. She keeps her collections in boxes shaped like rectangular prisms. Her seashell
algol [13]

Answer:

7 in

Step-by-step explanation:

volume of a rectangular prism = width x height x length

width x length = area of the base

the sea shell box

200 = width x length x 5

width x length = 200/5 = 40cm^2

rock box

280 = 40in^2 x height

height = 280/40 = 7 in

3 0
3 years ago
Ram is 9 years older than Hari. Three years ago, he was two times as old as Hari was. Find their present age.
True [87]

Answer:

Ram: 21, Hari: 12

Step-by-step explanation:

To solve the problem, we can use the following notation. We call:

r = Ram's age at present

h = Hari's age at present

We know that:

- Ram is 9 years older than Hari --> mathematically, this can be written as

r=h+9

- Three years ago, Ram was two times as old as Hari was --> mathematically, this can be written as

r-3=2(h-3)

where (r-3) is Ram's age 3 years ago, while (h-3) is Hari's age 3 years ago

Substituting eq.(1) into eq.(2), we  find:

(h+9)-3=2(h-3)\\h+9-3=2h-6\\h+6=2h-6\\h=12

So, Hari's age is 12; therefore, Ram's age is

r=12+9=21

4 0
4 years ago
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