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3 years ago

WhAt DO I DOOO!? IM SO CONFUSED...T-T

Mathematics

1 answer:

AnnyKZ [126]3 years ago

5 0

Answer:

1) along the line in the middle

2) point H

3) D

Step-by-step explanation:

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Two families went to the Zoo. The Diaz family paid $170 for 3 children and 2 adults. The Jones family paid $360 for 4 children a

lesantik [10]

Answer:

$\mathrm{A.\:}\begin{cases}3x+2y=170,\\4x+6y=360\end{cases}\\\\\mathrm{B.\:} \$ 30$

Step-by-step explanation:

We can write the following system of equations:

$\begin{cases}3x+2y=170,\\4x+6y=360\end{cases}$ , with variables as defined in the question.

Multiply the first equation by $-3$ and add both equations to isolate and solve for $x$ :

$\begin{cases}-9x-6y=-510,\\4x+6y=360\end{cases}\\-5x=-150,\\x=\fbox{$\$ 30$}$ .

3 0

3 years ago

Write an equation about money. You started with $9. You spent some of it. Now you have $5.

KIM [24]

Answer:

9-4=5

Step-by-step explanation:

6 0

3 years ago

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Which expression is equivalent to (x2 – 3x)(4x² + 2x - 9)

MAXImum [283]

Answer:

$\large\boxed{(x^2-3x)(4x^2+2x-9)=4x^4-10x^3-15x^2+27x}$

Step-by-step explanation:

$(x^2-3x)(4x^2+2x-9)\qquad\text{use}\ (a+b)(c+d+e)=ac+ad+ae+bc+bd+be\\\\=(x^2)(4x^2)+(x^2)(2x)+(x^2)(-9)+(-3x)(4x^2)+(-3x)(2x)+(-3x)(-9)\\\\=4x^4+2x^3-9x^2-12x^3-6x^2+27x\qquad\text{combine like terms}\\\\=4x^4+(2x^3-12x^3)+(-9x^2-6x^2)+27x\\\\=4x^4-10x^3-15x^2+27x$

3 0

3 years ago

Can I please have help

Dima020 [189]

Answer:

15a+12ac+6ab

Step-by-step explanation:

3a(5 + 4c + 2b)

5*3a = 15a

4c*3a = 12ac

2b*3a = 6ab

6 0

3 years ago

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The equation for the position of an object at time t is represented by the equation f(t)=4t^2-2t. Which equation represents the

max2010maxim [7]

Answer:

The equation that represents the instantaneous velocity at any given time, t is:

$v (t) = 8t -2$

Step-by-step explanation:

In physics, the equation that describes the instantaneous velocity of an object is the derivative of the position of this object as a function of time.

In this problem we have the function that describes the position of the object at a time t.

$f (t) = 4t ^ 2-2t$

Therefore to obtain the instantaneous velocity we derive f (t) with respect to time

$\frac{df(t)}{dt} = 2(4)t-2\\\\\frac{df(t)}{dt} = 8t-2 = v (t)$

Finally the equation of velocity is:

$v (t) = 8t -2$

8 0

3 years ago

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