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Phantasy [73]
3 years ago
10

7x-3 = 5x+ 15

Mathematics
1 answer:
Degger [83]3 years ago
6 0

Answer:

7x-3 = 5x+ 15

2x-3 = 15            (you will need to subtract the variables to get 2x)

2x = 18                (next, add the constants to result up to 18)

x = 9                   (lastly, divide the constant 18 with the coefficient 2 to get 9)

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X^2+10x+19=0 complete the square PLEASE EXPLAIN
wlad13 [49]

Answer:

Step-by-step explanation

In the form ax^2+bx+c

a x c should equal two factors of b

However, in this equation

1 x 19 has no factors that = 10

so you must use the Quadratic Formula which is,

x = \frac{-b+-\sqrt{b^2-4ac} }{2a}

so the answer should be

x = \frac{-10+-\sqrt{10^2-4(1)(19)} }{2(1)}

x = \frac{-10+-\sqrt{24} }{2}

x = \frac{-10+2\sqrt{6} }{2}      and    x = \frac{-10-2\sqrt{6} }{2}

8 0
3 years ago
ILL GIVE BRAINLIEST TO QUICKEST AND BEST ANSWER!
Lana71 [14]

Answer:

A. x^{3} + 3x^{2} +5x+3

B. 2x^{3} -3x^{2} -5x+6

C. 3y^{3} - 4y^{2} -11y+4

D. x^{2} - 2xy+y^2+x - y

E.  3m^2-2mn-n^2+6m+2n

F.  4x^4+4x^3+5x^2+2x+1

4 0
3 years ago
A piece of machinery depreciates $5000 the first year,
eimsori [14]

Answer:

A- $3500

Step-by-step explanation:

The depreciation rate is $300

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$300 x 3 = 900

$4400 - 900 =

$3500.

4 0
3 years ago
Salma is in charge of decorating the school gym for a party. She has budgeted some money for decorations. Balloons (x) cost $2.5
Artyom0805 [142]

Answer:

your answer would be A.

Step-by-step explanation:

Already you know that answers b and d are not an option because it is saying she can use OVER 45 dollars. So she has to use EQUAL or less then 45 dollars. So the answer has to be A or C. In answer C it is saying she can spend MORE then 2.50 for a bunch where she cant. She has to spend exactly or less then that amount. So your answer is A.

5 0
4 years ago
Find the GCF of 40, 55, and 72.
Papessa [141]

Answer: 5

Step-by-step explanation:

8 0
4 years ago
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