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2 years ago

PLEASE ANSWER CORRECTLY Which of the following is an equivalent for of 5x2 - 13 x-6 ?

Mathematics

1 answer:

Pepsi [2]2 years ago

7 0

Answer: None of these answers are correct; tell this to your teacher. The 1st answer is closest to correct.

Step-by-step explanation:

The second and fourth answers are not viable because expanding them would result in x^3 which is not in the original equation.

1. 5x(x+3)-2(x+3)

5x^2+13x-6, This answer is closest to correct and may be correct in the case of a typo.

3. 5x(x-3)-2(x-3) ; Expand

5x^2-15x - 2x +6

5x^2-17x+6

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Pls tell me the rest of the angles. Angle 1 is 112.9 degrees

Annette [7]

1. 112.9

2. 67.1

3. 112.9

4. 67.1

hope that helped^^

6 0

2 years ago

Find the value of k and x2 x^2+ 13x + k = 0, x1=-9

Anarel [89]

Given:

The quadratic equation is:

$x^2+13x+k=0$

$x_1=-9$

To find:

The value of k and $x_1$ .

Solution:

We have,

$x^2+13x+k=0$ ...(i)

Putting $x=-9$ , we get

$(-9)^2+13(-9)+k=0$

$81-117+k=0$

$-36+k=0$

$k=36$

Putting $k=36$ in (i), we get

$x^2+13x+36=0$

Splitting the middle term, we get

$x^2+9x+4x+36=0$

$x(x+9)+4(x+9)=0$

$(x+9)(x+4)=0$

$x=-9,-4$

Here, $x_1=-9$ and $x_2=-4$ .

Therefore, the required values are $k=36$ and $x_2=-4$ .

3 0

2 years ago

How do I find the area

inn [45]

Wasssaa,

Steps:

To find the area of a triangle you multiply the base times the height, in this case the is (19m)
and the height is (11m), after you multipy those numbers you divide by (2)
$(19m \times 11m) \div 2$
$\frac{209 }{2}$

Answer:
$104.5sq \: m$
Hope this helped you
:D

8 0

2 years ago

Tyler does squats and pushups. He wants to increase the number of each type of exercise by 20% by the end of the month. He curre

Semenov [28]

Answer:

Tyler currently does 40 squats

Step-by-step explanation:

Tyler does squats and pushups.

Currently:

Number of pushups = 25

Number of squats = x

Total number = 25 + x

After increase:

Number of pishups $=25\cdot (1+0.2)=1.2\cdot 25=30$

Number of squats $=x\cdot (1+0.2)=1.2x$

Total number $=30+1.2x$

If Tyler meets his goal, he will do a total of 13 more squats and pushups than he does now, thus

$(30+1.2x)-(25+x)=13\\ \\30+1.2x-25-x=13\\ \\1.2x-x=13-30+25\\ \\0.2x=8\\ \\2x=80\\ \\x=40$

6 0

2 years ago

(2 to the power -1 ÷ 5 to the power- 1)2 × -5/8 to the power -1

Luba_88 [7]

Answer:

-8

Step-by-step explanation

2 to the power of -1 = 0.5

5 to the power of -1 = 0.2

0.5/0.2 = 2.5

So,

(2.5)2 x -5/8 to the power of -1

-5/8 = -0.625

-0.625 to the power of -1 = -1.6

So,

(2.5)2 x -0.625

5 x -0.625

= -8

8 0

2 years ago

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PLEASE ANSWER CORRECTLY Which of the following is an equivalent for of 5x2 - 13 x-6 ?​

PLEASE ANSWER CORRECTLY Which of the following is an equivalent for of 5x2 - 13 x-6 ?