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natali 33 [55]
3 years ago
5

HELP I DONT UNDERSTAND PLSS HELP :(

Mathematics
1 answer:
kirill [66]3 years ago
3 0

Answer:

D

Step-by-step explanation:

The range of a graph is the span of y-values it covers.

From the graph, we can see that the span of y-values covered goes from y=-3 all the way to y=3.

However, note that at y=-3, while it is a closed circle, it is an open circle at y=3.

This means that we do <em>not</em> include y=3 in our range, but we <em>do</em> include y=-3 in our range.

So, our range is all values between -3 and 3 including -3.

In set notation, this is (and remember since this is the range, to use y):

\{y|-3\leq y

So, our answer is D.

And we're done!

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2000×40 with step by step explaination​
leva [86]

Answer:

80000

Step-by-step explanation:

you multiply 2000x40 and get 80000 or you can do 8x10^4

7 0
3 years ago
Multiplying binomials (×+2) (×-9)
musickatia [10]

Answer:

x² -7x -18

Step-by-step explanation:

In algebra, a binomial consists solely of a sum or subtraction of two monomials.  

To solve the multiplication of two binomials we have to multiply term by term and then simplify common terms.

(x + 2)(x - 9) = x(x) + x(-9) +2(x) + 2(-9) = x² -9x + 2x -18 = x² -7x - 18

7 0
3 years ago
A restaurant has 18 tables and 54 chairs. The
luda_lava [24]

Answer:

The ratio is 1:3

Step-by-step explanation:

Let

x -----> the number of tables in the restaurant

y ----> the number of chairs in the restaurant

we know that

To find out the ratio of tables to chairs in the restaurant, divide the number of tables by the number of chairs

we have

x=18\ tables\\ y=54\ chairs

so

The ratio is equal to

\frac{18}{54}

Simplify

Divide by 18 both numerator and denominator

\frac{1}{3}

therefore

The ratio is 1:3

6 0
3 years ago
If f(x)=x^2-9/x+3 is continuous at x=-3, find f(-3). <br><br> A. 3<br> B. -3<br> C. -6<br> D. 6
melamori03 [73]

Answer:

x = 3

Step-by-step explanation:

x^2 - 9 = (x+3)(x-3)

[(x + 3)*(x -3] /x+3) = x-3

x - 3 = 0

x = 3

3 0
3 years ago
X+2y=-7<br> if y=-6 what is x<br> pls help
Julli [10]
X+2y=-7..... (1)
y=-6.....(2)
equation (2) into equation (1)
x+2y=-7
x+2(-6)=-7
x-12=-7
x=-7+12
x=5
7 0
3 years ago
Read 2 more answers
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