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velikii [3]
2 years ago
12

If x = 3 and y = 7 , evaluate the following expression: 20 − ( 3 y − 4 x )

Mathematics
2 answers:
xenn [34]2 years ago
6 0

Answer:

20-3(7)-4(3)

20-21-12

-13

Mariulka [41]2 years ago
4 0

Answer:

20 - (3(7) - 4(3)) = ?

20 - (21 - 12) = ?

20 - 9 = 11

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after riding the stationary bike for just 8 minutes, betty had burned 50 calories. how long must she ride if she wants to burn 3
Lyrx [107]

Answer:

52 minutes.

Step-by-step explanation:


4 0
3 years ago
in a game involving a pair of fair dice a player rolls the dice until he gets a sum of 7 let z equal the number of rolls it take
Anarel [89]

Answer:

z = 36 rolls , probability for getting 7 = 1/6

Step-by-step explanation:

A die has 6 possible outcomes, which sums to 36 for two dice for every value on both dice.

The outcomes for rolling both dice for 36 times gives 6 possible outcomes summing to 7, that is, (1, 6), (2, 5), (3, 4), (4, 3), (5, 2), and (6, 1).

There the probability of getting a sum dice of 7 is:

= 6 / 36 = 1/6

8 0
3 years ago
Sophie pays m dollars to rent a car for the weekend on the drive home she buys $45 worth of gasoline her friend melody pays for
Hoochie [10]

Complete Question

Sophie pays m dollars to rent a car for the weekend. On the drive home, she buys $45 worth of gasoline. Her friend Melody pays for one-half the cost of the car rental only. Write an expression you could use to determine how much Sophie spent.

Answer:

1/2m + 45

Step-by-step explanation:

We are told in the question that:

On the drive home, she buys $45 worth of gasoline.

Her friend Melody pays for one-half the cost of the car rental only.

Sophie pays m dollars to rent a car for the weekend.

The amount sophie pays for car rental = m - 1/2m

= 1/2m

Therefore, the expression used to determine how much sophie spent is written as:

1/2 × $m + $45

1/2m + 45

4 0
3 years ago
How much water did all the students drink on Wednesday? Explain how you figured it out. Make sure to use complete sentences and
Nady [450]

Answer:

6.58 I could be wrong but that's pretty much it is it all students together in total?

Step-by-step explanation:

just add 1.94+0.97+1.8+1.87=6.58

7 0
3 years ago
6.Identify the terms in the expression: 9 + 11y – y2 + y3 – 4y4
Maslowich
<span>6. 9 + 11y – y2 + y3 – 4y4 
This expression has 5 terms.

7. </span><span>(2a + 3b) + 4c = 2a + (3b + 4c) 
Associative property of addition, because you're moving the parentheses. 
</span><span>
8. </span><span>If m = 4 and n = 4, then m = n
Substitution property.

9. </span><span>-9 + 5 – (-2) + 17
-4 - (-2) + 17
-2 + 17
15

10. </span><span>- 35 - (- 13 )
-22

11. -40 + 23 - 19 + 31
-17 - 19 + 21
36 + 21
57

12.</span><span> (-2)³
-2 * -2 * -2
-8

13. - 925

14. </span><span>15(3y – 5)
45y - 75

15. (7 + 6w)6
42 + 36w

16. </span><span>3n+57

17. 9p-63</span>
5 0
3 years ago
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