All categories

2 years ago

Help please !!!! I need this I don’t need a detailed explanation

Mathematics

2 answers:

natta225 [31]2 years ago

7 0

Answer:

The answer is C, -6/5

Advocard [28]2 years ago

3 0

Answer:

-6/5 (This is Answer c)

Step-by-step explanation:

Re-writing this equation in standard form, we get:

25x^2 + 60x + 36 = 0. The coefficients are a = 25, b = 60 and c = 36.

The discriminant, b^2 - 4ac, is 60^2 - 4(25)(36), or 3600 - 3600, or 0.

Because the discriminant is 0, we have two real, equal roots, corresponding to

-b -60

x = ------ = ---------- = -6/5 (This is Answer c)

2a 2(25)

You might be interested in

Orthogonalizing vectors. Suppose that a and b are any n-vectors. Show that we can always find a scalar γ so that (a − γb) ⊥ b, a

jeka57 [31]

Answer:

$\\ \gamma= \frac{a\cdot b}{b\cdot b}$

Step-by-step explanation:

The question to be solved is the following :

Suppose that a and b are any n-vectors. Show that we can always find a scalar γ so that (a − γb) ⊥ b, and that γ is unique if $b \neq 0$ . Recall that given two vectors a,b a⊥ b if and only if $a\cdot b =0$ where $\cdot$ is the dot product defined in $\mathbb{R}^n$ . Suposse that $b\neq 0$ . We want to find γ such that $(a-\gamma b)\cdot b=0$ . Given that the dot product can be distributed and that it is linear, the following equation is obtained

$(a-\gamma b)\cdot b = 0 = a\cdot b - (\gamma b)\cdot b= a\cdot b - \gamma b\cdot b$

Recall that $a\cdot b, b\cdot b$ are both real numbers, so by solving the value of γ, we get that

$\gamma= \frac{a\cdot b}{b\cdot b}$

By construction, this γ is unique if $b\neq 0$ , since if there was a $\gamma_2$ such that $(a-\gamma_2b)\cdot b = 0$ , then

$\gamma_2 = \frac{a\cdot b}{b\cdot b}= \gamma$

6 0

3 years ago

Evaluate 51x3 - 21 + 7 when x = -2.<br> DONE

Nana76 [90]

Answer:

-320 i guess

Step-by-step explanation:

51*-2*3-21+7=-320

3 0

2 years ago

Read 2 more answers

Can someone help me with this problem.

Oksanka [162]

Answer:

negative because the container is losing liquid.

Step-by-step explanation:

y-5x is the rate

7 0

2 years ago

The area of a square is 225 square inches.find the length of one side

Lana71 [14]

The answer is 15inches

6 0

2 years ago

Use the grouping method to factor the polynomial below completely.

xxMikexx [17]

The correct answer is C, if you use the distributive property and multiply all of them by each other you would get x^3+2x^2+3x+6.

Hope this helps :-)

7 0

2 years ago

Read 2 more answers