3 years ago

Find the missing number so that the equation has infinitely many solutions.

Mathematics

2 answers:

Lana71 [14]3 years ago

5 0

3x + 9= 3 (x + 3)
x + 9 + x= 2x + 9

IgorLugansk [536]3 years ago

5 0

Answer:

x= 0 is correct.

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What is the approximate distance between the points (-6, 8) and (4, 13)?

ddd [48]

Answer:

5√5

Step-by-step explanation:

To find the distance you can use the distance formula.

√(13 - 8)^2 + (4 + 6)^2

√25 + 100

√125

5√5

3 0

4 years ago

A customer placed an order with a bakeryfor muffins .The baker has completed 37.5%of the order after baking 81 muffins . How man

inysia [295]

Answer:

216 muffins were ordered

Step-by-step explanation:

81/x = 37.5%/100%

divide 37.5 by 100

81/x = .375

multiply x to both sides

×(x)= ×(x)

81 = .375x

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3 years ago

Simplify the ratio 18b^2 to 45b

geniusboy [140]

18b^2 : 45b

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3 0

3 years ago

Log5(x-1)+log5(x+3)-1=0

jonny [76]

Answer:

there are no real solutions

Step-by-step explanation:

$\log_5(x-1)+\log_5(x+3)-1=0\\\\\log_5(x-1)+\log_5(x+3)=1$

there is a rule that says

$\log_b(a)+\log_b(c)=\log_b(ac)$

so we have

$\log_5(x-1)+\log_5(x+3)=\log_5((x-1)(x+3))=1$

and we have the definition

$\log_a(b)=c\\\\a^{c} =b$

so we have

$5^{1} = (x-1)(x+3)\\\\5=x^{2} -1x+3x-3\\\\5=x^{2} +2x-3\\\\0=x^{2} +2x-3-5\\\\0=x^{2} +2x-8\\\\$

and using the quadratic formula we get that

there are no real solutions

3 0

3 years ago

Read 2 more answers

If 70% of a number is 42 and 15% of the same number is 9, find 85% of that number.

BigorU [14]

Answer: 51

Step-by-step explanation:

let x be the number.

(70%)x = 42

0.7 x = 42

x = 60

we check 15% x 60 = 0.15 x 60 = 9, which is true.

85% of that number = 85% x 60 = 0.85 x 60 = 51.

6 0

3 years ago

Read 2 more answers