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m_a_m_a [10]
3 years ago
5

Apply the communicative property to 13×7×21 to arrange the terms and still get the same solution

Mathematics
1 answer:
zimovet [89]3 years ago
7 0

7x13x21, 21x13x7, 21x7x13

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Hello! i need help! I Am a 5th grade scholar
stich3 [128]

0.4 is 10 times as much as 0.04

this is because 0.04 times 10 is 0.4

0.003 is 1/10 of 0.03

0.003 times 10 is 0.03

6 0
4 years ago
I need help!!
netineya [11]

Answer:

2x +21

Step-by-step explanation:

log_{5} {5}^{(2x - 9)}   +  log_{3} {729}^{5}   \\  \\  =  log_{5} {5}^{(2x - 9)}   +  log_{3} {( {3}^{6} )}^{5}   \\  \\  =  log_{5} {5}^{(2x - 9)}   +  log_{3} { {3}}^{6 \times 5}   \\  \\  =  log_{5} {5}^{(2x - 9)}   +  log_{3} { {3}}^{30}    \\  \\ =(2x - 9)  log_{5} {5} + 30 log_{3} { {3}}   \\  \\  = (2x - 9).1 + 30(1 )\\ ( \because \: log_{a} { {a}}    = 1) \\  \\  = 2x - 9 + 30 \\  \\  = 2x +21

7 0
3 years ago
which of the statements about the following quadratic equation is true? 6x2 - 8 = 4x2 7x the discriminant is greater than zero,
d1i1m1o1n [39]
6x^2 - 8 = 4x^2 + 7x
6x^2 - 4x^2 - 7x - 8 = 0
2x^2 - 7x - 8 = 0
discriminant = b^2 - 4ac; where a = 2, b = -7 and c = -8
d = (-7)^2 - 4(2)(-8)
d = 49 + 64
d = 113

the discriminant is greater than zero, so there are two real roots


5 0
4 years ago
Read 2 more answers
Zachary purchased a computer for $1,200 on a payment plan. Four months after he purchased the computer, his balance was $780. Fi
DedPeter [7]

Answer:

y = 105x

Step-by-step explanation:

He loses $105 per month

8 0
3 years ago
- An expression is shown. 12.3 - (-21.45) What is the value of the expression? ​
Rus_ich [418]

Answer:

33.75

Step-by-step explanation:

12.3 -(-21.45)

12.3 + 21.45 (<em>because</em><em> </em><em>minus </em><em>of </em><em>minus </em><em>becomes</em><em> </em><em>plus)</em>

33.75

6 0
2 years ago
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