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azamat
3 years ago
13

Penny solved an equation by subtracting

Mathematics
1 answer:
Vladimir [108]3 years ago
7 0

Answer:

Step-by-step explanation:1/5x+6=11

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Write the data set represented by the stem-and-leaf plot
tigry1 [53]

Answer:

The required data set is {1.5, 1.9, 2.1, 2.4, 2.7, 2.7, 4.0, 4.0, 4.2, 4.9}.

Step-by-step explanation:

The example of Stem Leaf representation is

4|2 = 4.2

We need need to find the data set that is represented by the stem-and-leaf plot.

Stem        Leaf           Data elements

1                5 9               1.5, 1.9

2               1 4 7 7         2.1, 2.4, 2.7, 2.7

3                  --                      --

4               0 0 2 9        4.0, 4.0, 4.2, 4.9

All the elements of given data set are

1.5, 1.9, 2.1, 2.4, 2.7, 2.7, 4.0, 4.0, 4.2, 4.9

Therefore the required data set is {1.5, 1.9, 2.1, 2.4, 2.7, 2.7, 4.0, 4.0, 4.2, 4.9}.

6 0
3 years ago
Mr. Hammond earns $13.75 per hours and worked 20.5 hours last week. How much did he earn last week?
IRISSAK [1]

Multiply total hours worked by pay rate:

20.5 x $13.75 = $281.88

8 0
4 years ago
Precalc.
viktelen [127]
Domain: x>0.

(\log_2x)^2+7\log_2x+12=0

Substitute t=\log_2x\in\mathbb{R}. We have:

 t^2+7t+12=0\\\\a=1\qquad b=7\qquad c=12\\\\\\\Delta=b^2-4ac=7^2-4\cdot1\cdot12=49-48=1\\\\\sqrt{\Delta}=\sqrt{1}=1\\\\\\
t_1=\dfrac{-b-\sqrt{\Delta}}{2a}=\dfrac{-7-1}{2}=\dfrac{-8}{2}=-4\\\\\\
t_2=\dfrac{-b+\sqrt{\Delta}}{2a}=\dfrac{-7+1}{2}=\dfrac{-6}{2}=-3

For t₁ there will be:

\log_2x=t_1\\\\\log_2x=-4\\\\2^{-4}=x\\\\x=\dfrac{1}{2^4}\\\\\\x=\dfrac{1}{16}=0,0625\\\\\\\boxed{x\approx0,063}

and for t₂:

\log_2x=t_2\\\\\log_2x=-3\\\\2^{-3}=x\\\\x=\dfrac{1}{2^3}\\\\\\x=\dfrac{1}{8}\\\\\\\boxed{x=0,125}

Answer d)


6 0
3 years ago
A trampoline has a rectangular jumping surface that is 10.3 feet long and 9.2 feet wide. What is the area of the jumping surface
Maslowich
The area of the trampoline is 94.76 because if you multiply 10.3 and 9.2 you will get the answer
4 0
3 years ago
Heeeeeeeeeeeeeeeeelp
Vanyuwa [196]

Answer:

230 cm squared

Step-by-step explanation:

Split the shape into a triangle and a rectangle

The area of a triangle is base x height / 2

20 x 9= 180/2= 90             (9 because you do 16-7 to find height of triangle)

Find the area of the rectangle=

7 x 20= 140

Add them up

140+90= 230cm squared

<em>I hope this helped :)</em>

7 0
4 years ago
Read 2 more answers
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