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murzikaleks [220]
2 years ago
10

Evaluate the expression when y=6 y²-9y-7

Mathematics
1 answer:
Aneli [31]2 years ago
6 0

Answer:

The answer would be Y= 5 ± √67 / 6

Step-by-step explanation:

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6x + y = -2<br> y= -3x + 1<br><br> Graph the solution
Gala2k [10]
6x + y = -2
y = -3x + 1

Substitute the value of y in first equation, 
6x -3x + 1 = -2
3x = -2-1
x = -3/3
x = -1

Now, Substitute it in 2nd equation, 
y = -3(-1) + 1
y = 3+ 1 = 4

Coordinates would be: (-1,4) Mark that point and join with origin.

Hope this helps!
6 0
3 years ago
Pls answer this for brainly
zimovet [89]

Answer:

54

Step-by-step explanation:

x-1=3

2xy=24

3+24=27

27·2=54

4 0
3 years ago
Read 2 more answers
The camera cost $540 if the sales tax is 7.2% what is the tax change and the total cost?
suter [353]

Answer:

$75 ?

Step-by-step explanation:

If this is wrong super sorry :)

7 0
2 years ago
In the figure shown, ABC is a right triangle with side lengths a, b, and c, and CD is an altitude to side AB. The side lengths o
ycow [4]

Answer:

A

Step-by-step explanation:

In the figure shown, ABC is a right triangle with side lengths a, b, and c, and CD is an altitude to side AB. This altitude divides the triangle into two right triangles ADC and BDC. In these triangles,

  • \angle CBD\cong \angle ACD\cong \angle CBA
  • \angle DCB\cong \angle DAC\cong \angle BAC

So,

\triangle ABC\sim \triangle CBD\sim \triangle ACD

1. From the similarity \triangle ABC\sim \triangle CBD, you have

\dfrac{AB}{BC}=\dfrac{BC}{BD}\\ \\\dfrac{c}{a}=\dfrac{a}{s}

2. From the similarity \triangle ABC\sim \triangle ACD, you have

\dfrac{AB}{AC}=\dfrac{AC}{AD}\\ \\\dfrac{c}{b}=\dfrac{b}{r}

Hence, option A is true

5 0
3 years ago
SIMPLIFY (4-74+7) A. 223 B. 9 27 C. 9+2/7 D. 9
sesenic [268]

Answer:

The correct option is D.

Step-by-step explanation:

The given expression is

(4-\sqrt{7})(4+\sqrt{7})

Difference of two squares property:

a^2-b^2=(a+b)(a-b)

Using the above property, the given expression can be written as

(4)^2-(\sqrt{7})^2

Applying square we get

16-7

9

Therefore the correct option is D.

6 0
3 years ago
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