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3 years ago

Answers for both boxes please

Mathematics

1 answer:

sleet_krkn [62]3 years ago

7 0

Answer:

x = -5 y = -3

Step-by-step explanation:

-3x + 2y = 9

multiply the 2nd equation by 3 to set it up for elimination

3(x - 3y)= 3(4)

3x-9y = 12

so now combine both to add

-3x + 2y = 9

3x - 9y = 12

Adding both gives you

-7y = 21

divide both by -7 and you get

y = -3

and you substitute y back into equation to get x

x - 3 (-3) = 4 gives you

x + 9 = 4

x = 4 - 9

x = -5

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What equation can be used to find the length of AC

Leno4ka [110]

I'm pretty sure this is the answer:
(10)sin(40°) = AC

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5 0

3 years ago

What's the volume of the cone?

dmitriy555 [2]

V = (pi)r^2h / 3
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7 0

3 years ago

If h (r)= 2/3 r - 6, what is the value of h(-9)?

Bad White [126]

Answer:

$h(-9)=-\frac{2}{33}$

Step-by-step explanation:

The given expression is $h(r)=\frac{2}{3r-6}$

We want to find the value of h(-9).

We substitute r=-9 to obtain:

$h(-9)=\frac{2}{3(-9)-6}$

We multiply out to obtain:

$h(-9)=\frac{2}{-27-6}$

We simplify the denominator to obtain:

$h(-9)=\frac{2}{-33}$

This is the same as:

$h(-9)=-\frac{2}{33}$

3 0

3 years ago

VT is the diagonal of a rhombus. What is the slope of the other diagonal?

noname [10]

Answer:

Step-by-step explanation:

Remark

The slope of the given segment is found by using the 2 end points.

V(3,2) and T(5,7)

Slope of VT

Givens

y2 = 7
y1 = 2
x2 = 5
x1 = 3

Formula

m = (y2 - y1)/(x2 - x1)

Solution

m = (7 - 2)/(5 -3)

m = 5/2

Slope of other diagonal

m * m1 = - 1

5/2 * m1 = - 1

5m1 = -1*2 = -2

m1 = -2/5

6 0

3 years ago

Can someone help me please

babunello [35]

If the functions are inverses, then f(g(x)) = x.

$\displaystyle f(g(x))=f\left(\frac{3x+1}{3}\right)=\frac{1}{\frac{3x+1}{x}-3}\\\\=\frac{1}{\left(\frac{3x+1-3x}{x}\right)}=\frac{1}{\left(\frac{1}{x}\right)}=x$

The functions are inverses of each other.

B. The domain of f(x) = x≠3. The domain of g(x) is x≠0.

The domain of f(g(x)) is (-∞, 0) ∪ (0, ∞).

The domain of g(f(x)) is (-∞, 3) ∪ (3, ∞).

4 0

3 years ago

Answers for both boxes please ​

Answers for both boxes please