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3 years ago

What is the difference between 2a + 5 and 2(a + 5)? Give an English expression to describe each of

Mathematics

1 answer:

Sergio [31]3 years ago

6 0

Answer:

without brackets, the two is only multiplying the a. with brackets, you distribute the 2, making the equation 2a+10

Step-by-step explanation:

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1. What number, when substituted for x in the following problem, will make the problem true?

riadik2000 [5.3K]

Answer:

x = 17.82

Step-by-step explanation:

6x + 8% = 107

-8% -8%

107 - 0.08 = 106.92

-----------------------------------

6x = 106.92

÷6 ÷6

x = 17.82

------------------------------------

I hope this helps!

8 0

2 years ago

How many factors in the expression 8(x + 4)(y + 4)(z to the second power + 4z + 7) have two terms?

dedylja [7]

(x+4) and (y+4) both have two terms..terms are separated by addition/subtraction operators

8 0

3 years ago

Equivalent ratios for 8:28

Tpy6a [65]

Answer:

8 : 28

x2 x2

16:56

Step-by-step explanation:

4 0

4 years ago

3x^2 - 4x = -2<br> Solve

amid [387]

Answer:

$x = \bigg \{\frac{ 2 - \sqrt{2} \: i }{3}, \: \: \frac{ 2 + \sqrt{2} \: i }{3} \bigg \}$

Step-by-step explanation:

$3 {x}^{2} - 4x = - 2 \\ 3 {x}^{2} - 4x + 2 = 0 \\ equating \: it \: with \\ a {x}^{2} + bx + c = 0 \\ a = 3 \: \: b = - 4 \: \: c = 2 \\ {b}^{2} - 4ac \\ = {( - 4)}^{2} - 4 \times 3 \times 2 \\ = 16 - 24 \\ = - 8 \\ \ {b}^{2} - 4ac < 0 \\ \therefore \: given \: quadratic \: equation \: have \: \\ imaginary \: solutios. \\ \\ x = \frac{ - b \pm \sqrt{{b}^{2} - 4ac } }{2a} \\ = \frac{ - ( - 4) \pm \sqrt{ - 8} }{2 \times 3} \\ = \frac{ 4 \pm 2\sqrt{2} \: i }{2 \times 3} \\ = \frac{ 2 \pm \sqrt{2} \: i }{3} \\ \therefore \: x = \frac{ 2 - \sqrt{2} \: i }{3} \: or \: x = \frac{ 2 + \sqrt{2} \: i }{3} \: \\ \\ x = \bigg \{\frac{ 2 - \sqrt{2} \: i }{3}, \: \: \frac{ 2 + \sqrt{2} \: i }{3} \bigg \}$

7 0

4 years ago

Dylan travelled 1/2 miles in 1/4 hour. How far in miles will Dylan travel in 2 hours?

anzhelika [568]

2 divided by 1/4 = 8

1/2 x 8 = 4

4 miles

7 0

3 years ago

Read 2 more answers