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shusha [124]
3 years ago
11

The base of a triangle is x cm and its height is (x-7) Write down the expression of the triangle

Mathematics
2 answers:
Nata [24]3 years ago
4 0

Step-by-step explanation:

if you mean the area of the triangle then it is S = 1/2*x(x-7)

marishachu [46]3 years ago
4 0

Answer:

Step-by-step explanation:

b= x cm

h = (x - 7) cm

Area of triangle = \frac{1}{2}*x*(x-7)\\\\

                           \frac{x*x-x*7}{2}\\\\=\frac{x^{2}-7x}{2}   square cm

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Historically, the proportion of people who trade in their old car to a car dealer when purchasing a new car is 48%. Over the pre
artcher [175]

Answer: The proportion of new car buyers that trade in their old car has statistically significantly decreased.

Step-by-step explanation:

Since we have given that

p = 48% = 0.48

n = 115

x = 46

So, \hat{p}=\dfrac{46}{115}=0.40

So, hypothesis would be

H_0:\ p=\hat{p}\\\\H_a:p

So, test value would be

z=\dfrac{p-\hat{p}}{\sqrt{\dfrac{p(1-p)}{n}}}\\\z=\dfrac{0.48-0.40}{\sqrt{\dfrac{0.48\times 0.52}{115}}}\\\\z=\dfrac{0.08}{0.0466}\\\\z=1.72

At 10% level of significance, critical value would be

z= 1.28

Since 1.28 < 1.72

So, we will reject the null hypothesis.

Hence, the proportion of new car buyers that trade in their old car has statistically significantly decreased.

6 0
3 years ago
What is the sum of r + s when r = –17.6 and s = 12.2? A. –29.8 B. –5.4 C. 5.4 D. 29.8
tankabanditka [31]
C. -5.4 -17.6+12.2= -5.4 because -17.6 goes first in the calculator but also its a negative
8 0
3 years ago
A 6 ft tall tent standing next to a cardboard box casts a 15 ft shadow. if the cardboard box casts a shadow that is 6 ft long th
ohaa [14]
What we know is that a 6 foot tall tent casts a 15 foot shadow. Lets represent that given this way: 6 = 15
So, the unknown (y), or what we want to know, is how tall the cardboard box if it has a 6 foot long shadow (noticeably the same height as the tent):
y = 6

6 = 15
y = 6

(6 x 6) / 15 = y
36 / 15 = y
2.4 = y

The height of the cardboard box is 2.4 feet.
4 0
3 years ago
Find the length of the third side. If necessary, write in simplest radical form.
MatroZZZ [7]

Answer:

2√6

Step-by-step explanation:

I will be honest with you and say that I'm not sure if it is right or not.

4 0
3 years ago
BRAINLIEST MARKED!! PLSS HELP ASAPP!! Plz show all work!!!
vitfil [10]

Answer:

551.7

Step-by-step explanation:

it is the square + the circle

15*25+πr²

375+π(15/2)²

375+π225/4

375+176.625=551.625

7 0
3 years ago
Read 2 more answers
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