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solmaris [256]
3 years ago
10

To find the value of an expression is to _______________.

Mathematics
1 answer:
kakasveta [241]3 years ago
3 0
Evaluate , I've had this question before and I got it right
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Evaluate 3x-2y; if x=7 and y=3
Zarrin [17]

Answer:

15

Step-by-step explanation:

3x - 2y = ?

3(7) - 2(3) = ?

21 - 6 = ?

= 15

All you have to do is substitute the given values & follow the order of operations! Best of luck.

3 0
3 years ago
Angharad had an operation costing $500 She was in hospital for x days The cost of nursing care was $170 for each day she was in
Ket [755]

Answer:

a) Total cost = 500 + 170x

b) 11 days

Step-by-step explanation:

Given:

(a)

Number of days in hospital = x

Cost of operation = $ 500

Cost of nursing per day = $170

∴ Cost of nursing for x days = $ 170x

Therefore, the expression for total cost of her operation and nursing care is given as,

C=500+170x, where C is the total cost.

(b)

Given:

Total cost of operation = C=\$ 2370

Using the expression obtained in (a), we solve for x.

C=500+170x

Plug in 2370 for C and solve for x. This gives,

2370=500+170x\\ 170x=2370-500\\ x=\frac{1870}{170}\\x=11

Therefore, Angharad stayed in hospital for 11 days.

7 0
3 years ago
19. What are the extremes of the following proportion?
Ad libitum [116K]
There is no proportion showing
3 0
3 years ago
At a pet store, the ratio of female birds to male birds was 7:4. Write a sentence explaining what this means.
cluponka [151]
For every 7 female birds, there are 4 male birds.
8 0
3 years ago
Convert 4/11using long division..... convert 5/11 with using long division
Lera25 [3.4K]
Hope this helps!
Vote me brainliest!

3 0
3 years ago
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