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Norma-Jean [14]

3 years ago

12

B=5a+7 -3a+2b=-7 What is the solution to the system of equations shown above?

2 answers:

anastassius [24]3 years ago

6 0

But the file is not open

Elena-2011 [213]3 years ago

4 0

a+b=-19

Primero hay que separar los números de las letras y luego sumar y/o restar y listo

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Determine the quadratic function f whose graph is given. The vertex is (1,-3) and y-intercept is -2

Nesterboy [21]

Answer:

Vertex form: $f(x)=(x-1)^2-3$

Standard form: $f(x)=x^2-2x-2$

Step-by-step explanation:

A quadratic function in vertex form is $f(x)=a(x-h)^2+k$ where $(h,k)$ is the vertex.

We are given $h=1,k=-3$ .

Let's plug that in:

$f(x)=a(x-1)^2-3$ .

Now let's find $a$ .

We will use the $y$ -intercept $(0,-2)$ to find $a$ .

$f(0)=a(0-1)^2-3$

$-2=a(0-1)^2-3$

$-2=a(-1)^2-3$

$-2=a(1)-3$

$-2=a-3$

$1=a$

So the function in vertex form is:

$f(x)=(x-1)^2-3$ .

In standard form, we will have to multiply and combine any like terms.

Let's do that:

$f(x)=(x-1)(x-1)-3$

$f(x)=x^2-x-x+1-3$

$f(x)=x^2-2x-2$

5 0

4 years ago

The ratio of the longer side of a rectangle to its shorter side is 4 to 3. If the shorter side of the rectangle is 21ft, what is

Eduardwww [97]

Answer:

28 ft

Step-by-step explanation:

Let longer side of rectangle be $L$ and the shorter side be $S$ , thus we can write the ratio:

$\frac{L}{S}=\frac{4}{3}$

<em>Now putting 21 into S, we solve for L:</em>

$\frac{L}{21}=\frac{4}{3}\\3L=4*21\\3L=84\\L=\frac{84}{3}=28$

Hence, length of longer side is 28 ft.

5 0

3 years ago

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Find the sum of the even integers between 21 and 45

Vika [28.1K]

22+24+26+28+30+32+34+36+38+40+42+44= 396

6 0

4 years ago

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need answers to this asap. I am a multiple of 70. I'm between 300 and 500. I'm 20 more than a 100. who am I

Jlenok [28]

Im not 100% sure but I would say 420

5 0

3 years ago

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What is 2y(x+4x-2x^2-8) completely factored

cluponka [151]

Answer:

$10yx-4yx^{2} -16y$

Step-by-step explanation:

7 0

3 years ago