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Whitepunk [10]
2 years ago
7

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

Mathematics
2 answers:
slavikrds [6]2 years ago
8 0

Answer:

17

Step-by-step explanation:

3x3=9    4x7=28   28+9=37   37-20=17

vladimir1956 [14]2 years ago
4 0

Answer:

11

Step-by-step explanation:

20-(3y-4x)

replace the variables

20-(3*7-4*3)

multiply

20-(21-12)

subtract

20-(9)

20-9

answer=11

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Question in screenshot.
Kitty [74]
Your answer is b. hope this helps :)
4 0
3 years ago
Please help me with this sum I will mark you as brainest​
Murljashka [212]

Answer:

Step-by-step explanation:

3/6 x 8

= ( 3 x 8 ) / 6

= 24 / 6

4/7 x 2

= ( 4 x 2 ) / 7

= 8 / 7

9/2 x 3

= ( 9 x 3 ) / 2

= 27 / 2

8/5 x 7

= ( 8 x 7 ) / 5

= 56 / 5

3/9 x 5

= ( 3 x 5 ) / 9

= 15/9

7/4 x 4

= ( 7 x 4 ) / 4

= 28 / 4

6/2 x 6

= ( 6 x 6 ) / 2

= 36 / 2

8/3 x 9

= ( 8 x 9 ) / 3

= 72 / 3

9/4 x 8

= ( 9 x 8 ) / 4

= 72 / 4

5/3 x 6

= ( 5 x 6 ) / 3

= 30 / 3

2/7 x 3

= ( 2 x 3 ) / 7

= 6 / 7

8/4 x 7

= ( 8 x 7 ) / 4

= 72 / 4

6/4 x 2

= ( 6 x 2 ) / 4

= 12 / 4

3 0
3 years ago
there are five people in a room each person shakes the hand of every person exacally once how many handshakes or exchanged
nalin [4]
25  because there's 5 people so you take 5 times 5
5 0
3 years ago
Find four consecutive even integers such that the sum of the second and fourth and integer is one half times the sum of the firs
Artyom0805 [142]
Okay lets create an eqn from that information

A first int, B second int, C third int, D fourth int.

B = A + 2
C = A + 4
D = A + 6
A is the smallest integer

B + D = 0.5 (A + C) 

Now lets substitute

(A + 2) + (A + 6) = 0.5(A + (A + 4))
now lets dist

2a + 8 = 0.5(2a +4)
2a + 8 = a + 2
a + 8 = 2
a = -6

B = -6 +2
B = -4
C = -6 + 4
C = -2
D = -6 + 6
D = 0

Now using B + D = 0.5(A + C)
-4 + 0 = 0.5(-6 + (-2))
-4 = 0.5 (-8)
-4 = -4

Correct 
Therefore, First integer is -6, second integer is -4, third integer is -2 and fourth integer is 0
8 0
3 years ago
How many grams are in 15 kilograms? 1.5 150 1,500 15,000
diamong [38]
15000 because 15kg x 1000 = 15000g
8 0
3 years ago
Read 2 more answers
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