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Lynna [10]
3 years ago
10

Please help me I really need help

Mathematics
1 answer:
charle [14.2K]3 years ago
4 0

Answer:

  1. 4
  2. 25

Step-by-step explanation:

A calculator is your friend for such problems.

___

Evaluating these by hand, the <em>Order of Operations</em> applies. First you do what's in parentheses, then you do multiplication, then addition/subtraction.

1. (3/4)·(12·4 -16) -20 = (3/4)(48 -16) -20 = (3/4)·32 -20 = 24 -20 = 4

2. (5/9)·(12·6 -42 +15) = (5/9)·(72 -42 +15) = (5/9)·(30 +15) = (5/9)·45 = 25

___

Of course, the <em>Order of Operations</em> applies within each level of parentheses.

Adding the opposite of a number is the same as subtraction. Likewise, subtracting the opposite of a number is the same as adding the number. The usual associative and commutative properties of addition and multiplication apply. Among other things, that means you can compute the product of an integer and a fraction in any convenient way:

  (3/4)·32 = 3·(32/4) = 3·8 = 24

  (5/9)·45 = 5·(45/9) = 5·5 = 25

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N76 [4]

Answer:

a)g: 3x + 4y = 10   b) a:x+y = 5           c) c: 3x + 4y = 10

h: 6x + 8y = 5         b:2x + 3y = 8         d: 6x + 8y = 5

Step-by-step explanation:

a) Has no solution

g: 3x + 4y = 10

h: 6x + 8y = 5

Above Equations  gives  you  parallel lines refer attachment

b) has exactly one solution

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Above Equations  gives  you  intersecting lines refer attachment

c) has infinitely many solutions

c: 3x + 4y = 10

d: 6x + 8y = 5

Above Equations  gives  you  collinear lines refer attachment

i) if we add   x + 2y = 1 to equation x + y = 5 to make an inconsistent system.

ii) if we add   x + 2y = 3 to equation x + y = 5 to create infinitely system.

iii) if we add  x + 4y = 1 to equation x + y = 5 to create infinitely system.

iv) if we add to x + y =5 equation x + y = 5  to change the unique solution you had  to a different unique solution

7 0
3 years ago
P(A) = .6, P(B) = .3, P(Β | A) = .5
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Answer:

A

Step-by-step explanation:

P(B|A)=\frac{A ~and~B}{P(A)} \\0.5=\frac{P(A and B)}{0.6} \\P(A~and~B)=0.5 \times 0.6=0.30

8 0
3 years ago
Yall pls this not funny anymoreee pls helpp
Rina8888 [55]

Answer:

42

Step-by-step explanation:

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so every side is increased by a factor of 3/4

so,Side J'K'=24+24×3/4=42

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