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tensa zangetsu [6.8K]
3 years ago
6

Show working these two questions​

Mathematics
1 answer:
Tresset [83]3 years ago
8 0

Answer:

4(1- 2x)

h = 9 cm

Step-by-step explanation:

4 - 8x

= 4(1- 2x)

A(\triangle ABC) = \frac{1}{2} \times AB\times h

27= \frac{1}{2} \times 6\times h

27= 3\times h

h =\frac{27}{3}

h =9 \: cm

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A lady buys 20 trinkets at a yard sale.
Katen [24]

Answer:

Lady purchased 12 trinkets costing $0.30 each and 8 trinkets costing $0.65 each.

Step-by-step explanation:

A lady buys total number of trinkets = 20

Cost of each trinket is either $0.30 or $0.65.

Let the number of trinkets is x she purchased for $0.30 and y for $0.65

Then x + y = 20 --------(1)

Since she spends total amount = $8.80

Then the equation will be

0.30x + 0.65y = 8.80 ---------(2)

We replace x = (20 - y) from equation (1) to equation (2)

0.30(20 - y) + 0.65y = 8.80

6 - 0.30y + 0.65y = 8.80

0.35y + 6 = 8.80

0.35y = 8.80 - 6

0.35y = 2.80

y = \frac{2.80}{0.35}

y = 8

Now we put y = 8 in equation (1)

x + 8 = 20

x = 20 - 8

x = 12

Therefore, lady purchased 12 trinkets costing $0.30 each and 8 trinkets costing $0.65 each.

7 0
3 years ago
I GIVE THANKS AND 5 STARS<br> look at the screenshot, help?? Please tell me how you got it!!
IrinaVladis [17]
We have to find out the coordinates of two points to find out the slope.
according to the figure,
first point is x1 = 1 & y1 = 2
second point is x2 = 4 & y2 = 1

slope = (y2 - y1) / (x2 - x1)
= (1-2) / (4-1)
= -1 / 3
3 0
3 years ago
According Two data from the 2010 United States Census 83.7% of Americans lived in the metropolitan area suppose maria researcher
Murrr4er [49]

Answer:

Mean is 83.7%

And, the standard deviation is 0.033

Step-by-step explanation:

The computation of the mean and the standard deviation is as follows:

Let us assume the P be the sample proportion

Mean is 83.7%

And, the standard deviation is

= \sqrt{\frac{p(1-p)}{n} } \\\\=\sqrt{\frac{0.837(1-0.837)}{125} }

= 0.033

8 0
3 years ago
What is the answer to this -3m=-9+-2m
ikadub [295]
1. <span>Simplify -9 + -2m to -9 - 2m

-3m = -9 - 2m

2. </span><span>Add </span>2m <span>to both sides

-3m + 2m = -9

3. </span><span>Simplify -3m + 2m to -m

-m = -9

4. </span><span>Multiply both sides by </span><span><span>−<span>1

m = 9

Done! :) our answer is m = 9</span></span></span>
5 0
3 years ago
What is the equation of the line that has a slope of 0 and passes through the point (6,-8)
Fofino [41]

\bf (\stackrel{x_1}{6}~,~\stackrel{y_1}{-8})~\hspace{10em} slope = 0 \\\\\\ \begin{array}{|c|ll} \cline{1-1} \textit{point-slope form}\\ \cline{1-1} \\ y-y_1=m(x-x_1) \\\\ \cline{1-1} \end{array}\implies y-(-8)=0(x-6)\implies y+8=0\implies y=-8

5 0
3 years ago
Read 2 more answers
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