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Diano4ka-milaya [45]
3 years ago
6

I don’t understand 12 and 14

Mathematics
1 answer:
Lena [83]3 years ago
3 0
#12:
p= 2.8y+2.2y+2x+5x+4x
p= 5y+11x

#14:
p= 2h+2h+4j+4j+4j+4j
p= 4h+16j
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200 kg of brass is melted down and cast into ornamental frogs, each weight 3/20kg. How many frogs are made?
Savatey [412]

Answer:

1,333 frogs

Step-by-step explanation:

okay so we know that mass remains conserved no matter where you are.

same here ^^

if the total mass of brass is 200 kg

the total mass of the new frogs formed from it when put together will be the same :)

and if there were n such frogs formed

we have,

total mass = n × mass of each frog

200 = n × 3/ 20

n = 4000/ 3

so it becomes something like 1,333.33

that is nearly 1,333 frogs can be made out of 200 kg of brass each weighing 3/ 20kg (the last ones a bit less to make upto 200kg)

5 0
3 years ago
Which of the following is equivalent to the expression below?
PilotLPTM [1.2K]

Answer:

C 9i

D -9i

Step-by-step explanation:

sqrt(-81)

sqrt(81) sqrt(-1)

we know that sqrt(-1) = i

±9i

8 0
3 years ago
-3x + 5y = -6<br> 6x - 10y = 12
enyata [817]

Answer:

1. Let's solve for x.

−3x+5y=−6

Step 1: Add -5y to both sides.

−3x + 5y + −5y = −6 + −5y

−3x = −5y − 6

Step 2: Divide both sides by -3.

−3x

−3

=

−5y−6

−3

x=

5

3

y+2

2. Let's solve for x.

6x−10y=12

Step 1: Add 10y to both sides.

6x−10y+10y=12+10y

6x=10y+12

Step 2: Divide both sides by 6.

6x

6

=

10y+12

6

x=

5

3

y+2

7 0
3 years ago
What is $7.50 admission; 20% off; 5.75% tax
Dvinal [7]

Hello, the answer you are looking for is $6.35. To get the answer, first do 7.50 divided by 5, is 1.50 off the admission that is 20% off then $7.50-1.50= $6 then you do 6 divided by 100= 0.06 x 5.75 % tax you add together total will be $6.35 the answer.

I hope  you understand the steps I explain.

4 0
3 years ago
Read 2 more answers
A circle with radius of 2cm sits inside a circle with radius of
Semmy [17]

Answer:

37.70 cm^2

Step-by-step explanation:

area of circle with radius 4 cm = (pi)r^2 = 3.14159 * (4 cm)^2 = 50.27 cm^2

area of circle with radius 2 cm = (pi)r^2 = 3.14159 * (2 cm)^2 = 12.57 cm^2

difference in areas = 37.70 cm^2

6 0
3 years ago
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