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nlexa [21]
3 years ago
7

Can someone help me, please thanks

Mathematics
1 answer:
Ilya [14]3 years ago
3 0
I believe that the answer is 1845




the surface area of the cube is 1350

the surface area of the pyramid is 495

the total surface area is :
1350 + 495 = 1845



good luck
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6 0
2 years ago
In a certain​ year, brand A of​ heart-rate watch cost ​$39.99 and brand B cost ​$59.99. A nonprofit community health organizatio
Oksi-84 [34.3K]

Answer:

Brand A = 21 heart-rate watches.

Brand B = 13 heart-rate watches.

Step-by-step explanation:

Let A be the number of Brand A heart watches and B be the number of Brand B heart watches.

We have been given that a nonprofit community health organization purchased 34 ​heart-rate watches for use at a wellness center.

We can represent this information in an equation as:

A+B=34...(1)

We have been given that in a certain​ year, brand A of​ heart-rate watch cost ​$39.99 and brand B cost ​$59.99 and the organization spent ​$1619.66 for the​ watches.

We can represent this information in an equation as:

39.99*A+59.99*B=1619.66...(2)

We will use substitution method to solve our system of equations.

From equation (1) we will get,

A=34-B

Substituting A=34-B in equation(2) we will get,

39.99*(34-B)+59.99*B=1619.66

1359.66-39.99*B+59.99*B=1619.66

-39.99*B+59.99*B=1619.66-1359.66

20*B=260

B=\frac{260}{20}

B=13

Therefore, the organisation purchased 13 heart-rate watches of brand B.

Now let us substitute B=13 in equation (1).

A+13=34

A+13-13=34-13

A=21

Therefore, the organisation purchased 21 heart-rate watches of brand A.

8 0
2 years ago
Hello, could someone help me with this one?
ipn [44]

Answer:

The answer is A

Step-by-step explanation:

3 0
3 years ago
Answer this and I’ll make you Brainly if it’s right
svlad2 [7]

Answer:

B

Step-by-step explanation:

f(x)=7x+6

If you replace 1 for x you get 7, then add 6 and you get 13.

Continue replacing x with the in numbers and you'll see they are all right

8 0
3 years ago
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Stolb23 [73]

Answer:area is 15cm please give me brainlest also a small 2 at the top of 15cm

Step-by-step explanation:

6 0
3 years ago
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