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ddd [48]
3 years ago
8

Factor the polynomial: 4x^2 - 121

Mathematics
2 answers:
Archy [21]3 years ago
7 0

Answer:

(2x + 11)(2x - 11)

Step-by-step explanation:

4x² - 121

rewrite the expression in the form of (a)² - (b)²:

(2x)² - (11)²

difference of squares a²-b²=(a+b)(a-b):

(2x + 11)(2x - 11)

vodomira [7]3 years ago
7 0
4x^2 equals 16 so it’s gonna be 16 -121 which equals -105
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We have been given that Jackson purchases a new car for $48,000. The car's value can be modeled by the  following exponential function: y = 48000(0.76)^t where y represents the car's  value and t represents time in years. We are asked to find the decay rate as a percentage.

We know that an exponential decay function is in form y=a\cdot (1-r)^x, where,

y = Final value,

a = Initial value,

r = Decay rate in decimal form,

x = time.

Upon comparing our given function y = 48000(0.76)^t with standard decay function  y=a\cdot (1-r)^x, we can see that 1-r=0.76.

Let us solve for r.

1-1-r=0.76-1

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Let us convert 0.24 into percentage.

0.24\times 100\%=24\%

Therefore, the decay rate is 24%.

8 0
3 years ago
Sally has 3 /4 of a yard of ribbon. she uses 1/8 yard of ribbon to make each bow. does she have enough ribbon to make 7 bows?
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Answer:

No

Step-by-step explanation:

3/4 of a yard is equal to 6/8 of a yard. If Sally wants 7 ribbons, she needs at least 7/8 yards of ribbon.

3 0
3 years ago
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Kenny and johnny went to thr water park. Johnny bought a $1.50 ice cream bar. Write an expression to represent the amount the tw
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2p+1.5=total spent I hope this helps

8 0
3 years ago
If the value of x=4, y=3 and z= -2 find the value of 2x+3z​
Oksana_A [137]

Answer:

<h2><em><u>2</u></em></h2>

Step-by-step explanation:

<em><u>To</u></em><em><u> </u></em><em><u>find</u></em><em><u> </u></em><em><u>value</u></em><em><u>:</u></em>

2x + 3z

<em><u>Given</u></em><em><u> </u></em><em><u>values</u></em><em><u>:</u></em>

x = 4, y = 3 and z = -2

<em><u>Solution</u></em><em><u>:</u></em>

2x + 3z

<em>(</em><em>Putting</em><em> </em><em>the</em><em> </em><em>values</em><em> </em><em>of</em><em> </em><em>x</em><em> </em><em>=</em><em> </em><em>4</em><em> </em><em>and</em><em> </em><em>z</em><em> </em><em>=</em><em> </em><em>-2</em><em>)</em>

= 2(4) + 3(-2)

= 8 - 6

= <em><u>2 (Ans)</u></em>

8 0
3 years ago
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What is the slope of (-18,-20),(-18, -15)
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Answer:

Undefined.

Step-by-step explanation:

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The denominator is 0. Therefore, the slope is undefined.

4 0
3 years ago
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