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irinina [24]
3 years ago
13

Help meeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee

Mathematics
1 answer:
Vladimir79 [104]3 years ago
4 0

Answer:60%

Step-by-step explanation:

There are 15 families total, with 9 of them owning 4 or more mobile devices. To find percent we can write (9/15)*100, giving us 60%

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The height of a triangle is 3cm less than twice the base. The area is 10cm2
Kamila [148]

Answer:

The base is 4cm and the height is 5cm.

Step-by-step explanation:

This is a solve the system question. Call H the height of the triangle and B the base. The question tells us:

H=2B-3

and

\frac{B \times H}{2}=10

Sub the first equation into the second (as H is already isolated). You will end up with a quadratic equation - solve that any way you wish (e.g. quadratic formula). I've provided the factored form below which shows you the roots:

\frac{B(2B-3)}{2}=10\\\frac{2B^2-3B}{2}=10\\2B^2-3B=20\\2B^2-3B-20=0\\(2B+5)(B-4)=0\\B= - \frac{5}{2},4

In this question, we take B=4. You can't have a negative side length so the other answer is eliminated. Now sub the value for B into either of the original equations. I'll use the first, again because H is already isolated:

H=2(4)-3\\H=8-3\\H=5

3 0
3 years ago
Can someone please help​
Artemon [7]

Answer:

1000

Step-by-step explanation:

3443-2476

=967

4 0
3 years ago
Two lines intersect in more than one point.
statuscvo [17]
That would be false because parallel lines don't intersect. But i can if one is straight and the other is Curved
7 0
3 years ago
According to a commercial, 4 out of 5 dentist recommend a certain brand of toothpaste. Suppose There are 120 dentist in your are
Genrish500 [490]
4/5 recommend, so about 4/5(120) = 96 doctors recommend the brand.
3 0
3 years ago
Help me and EXPLAIN plz
dalvyx [7]
Volume=length X breadth X height

hence, volume= 9.6 X 5 X 7 cubic millimeters
 
which is equal to 336 cubic mm
5 0
3 years ago
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