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kozerog [31]
3 years ago
6

Write an expression for "19 more than a number y."

Mathematics
1 answer:
SVEN [57.7K]3 years ago
8 0

Answer:

y+19

Step-by-step explanation:

simply because when it says "more than" or "less than" you have to flip it so it wouldnt be 19+y.

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I have no idea what the answer is lol
nikdorinn [45]

Answer:

A. y = \frac{2}{5}x -2

Step-by-step explanation:

The y-intercept starts at -2

The slope is \frac{2}{5} because it goes up 2 and 5 to the right.

The equation would be y = \frac{2}{5}x -2

8 0
3 years ago
Write the sum using summation notation, assuming the suggested pattern continues.
zavuch27 [327]

Answer:

It is the first choice.

Step-by-step explanation:

This is a sequence where

the next term is obtained by adding 6.

first term = -9 + 6(0) = -9

second term = -9 + 6(1) = -3

third term = -9 + 6(2) = 3

4th term = -9 + 6(3)  = 9  

and 81 = -9 + (6*15).

So the answer is  Sigma (-9 + 6n)  from n= 0 to n = 15.

6 0
4 years ago
A rectangle has a length of 23 feet less than 10 times it’s width . If the area of the rectangle is 770 square feet find the len
Tresset [83]

Answer:

The length of the rectangle is 54 feet .

Step-by-step explanation:

Given as :

The Area of rectangle = 770 square feet

The length is 23 feet less than 10 times its width

I.e Let The length of rectangle = L feet

And The breadth of rectangle = B feet

According to question

Length = 10 times width - 23

Or , L = 10 × B - 23

or, L = 10 B - 23

Now, Since Area of rectangle = A = Length × Breadth

Or, A = L × B

Or, 770 ft² = ( 10 B - 23 ) × B

Or, 770 = 10 B² - 23 B

Or, 10 B² - 23 B - 770 = 0

Now, solving this quadratic equation to get the value of B

Or, B = \frac{-b\pm \sqrt{b^{2}-4\times a\times c}}{2\times a}

or, B =  \frac{23\pm \sqrt{(-23)^{2}-4\times 10\times (-770)}}{2\times 10}

Or, B = \frac{-23\pm \sqrt{31329}}{20}

Or, B = \frac{-23 + 177}{20} , \frac{-23 - 177}{20}

∴ B = 7.7 , -10

So, The breadth of the rectangle = B = 7.7 feet

So, The length of the rectangle = L = ( 10 × 7.7 - 23 )

I.e L = 54 feet

Hence The length of the rectangle is 54 feet . Answer

6 0
3 years ago
Ms. Erin had 25 students in on of her math classes last semester. Now this class has 22 students. What is the percent of change?
-Dominant- [34]

Answer:

12% decrease

Step-by-step explanation:

[(new value - old value) / old value] x 100

(22 - 25) / 25 = -3/25 = -0.12

-0.12 x 100 = -12%

when you have a negative it indicates a decrease rather than an increase

6 0
3 years ago
Read 2 more answers
Use the Distributive Property to simplify the expression.<br><br> 2(x+12) = ???
Anna [14]
Answer:

2x+24

Explanation:

1. 2•x=2x

2. 2•12=24
8 0
3 years ago
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