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3 years ago

Please help me!!!!!!!! Factor z2 – 3z – 18

1 answer:

4 0

First, the factor pairs for 18 are:
1, 18
2, 9
3, 6

Since the middle term is -3, the two factors must be 3 apart. The only pair that is 3 values apart is 3, 6.
Since the middle value is negative, the larger number is negative. This means that the 6 is negative.
z = -6
z = 3

Set each equal to 0;
z = -6
z + 6 = 0

z = 3
z - 3 =0
So your factors are (z+6) and (z-3), or answer B.

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Anthony is shopping at a discount store. He really wants to buy a jacket that costs $129.99. The jacket is on sale for 25% off.

Blababa [14]

Answer:

dats alot

Step-by-step explanation:

4 0

3 years ago

what if the ice caps were melting even more rapidly and san francisco was losing about 2% of its land area per year as land and

Helga [31]

The exponential function that shows San Francisco area after x years is y = 49(0.98)ˣ

<h3>What is an exponential function?</h3>

An exponential function is in the form:

y = abˣ

Where a is the initial value of y and b is the multiplication factor.

Let y represent the land area of San Francisco after x years. Hence:

The city is only about 49 square miles in area, a = 49. It is losing 2% yearly, hence b = 100% - 2% = 0.98

The equation becomes y = 49(0.98)ˣ

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7 0

2 years ago

5 hundred times 10 unit and standard

Shtirlitz [24]

The expression 5 hundred times 10 unit in standard form is 5000

<h3>How to express the number in standard form?</h3>

The number is given as:

5 hundred times 10 unit

Express hundred as 100.

So, we have:

5 hundred times 10 unit = 5 * 100 times 10 unit

Express unit as 1.

So, we have:

5 hundred times 10 unit = 5 * 100 times 10 * 1

Express times as *.

So, we have:

5 hundred times 10 unit = 5 * 100 * 10 * 1

Evaluate the products

5 hundred times 10 unit = 5000

Hence, 5 hundred times 10 unit in standard form is 5000

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#SPJ1

3 0

1 year ago

A prism has a square base whose edges each measure 5 cm. The ratio of its height to its width is 4:1. Find the volume of the rec

Vika [28.1K]

I think the answer is 500?

7 0

4 years ago

alex is building a rectangular fence around his yard. The total perimeter of the fence is 68 feet and the area of the yard is 25

Westkost [7]

Let
x-------------> length of the fence
y-------------> width of the fence

we know that
Area of rectangle=x*y
perimeter of rectangle=2x+2y
A=250 ft²
P=68 ft

then
250=x*y-----------> x=250/y equation 1
68=2x+2y-----------> equation 2

using a graph tool---------> to resolve the system of equations
see the attached figure

the solution is the point 1 (10.755,23.245) and the point 2 (23.245,10.755)

for the point 1
x=10.755 ft
y=23.245 ft

for the point 2
x=23.245 ft
y=10.755 ft

the answer is
<span>the dimensions of the fence are
23.245 ft x 10.755 ft
</span>or
10.755 ft x 23.245 ft

5 0

4 years ago