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LuckyWell [14K]
3 years ago
13

1. How many total students were surveyed?

Mathematics
1 answer:
Serjik [45]3 years ago
4 0

Answer:

A if I'm not incorrect. Sorry if I am incorrect I'm bad at math.

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Question: What is the complementary angel of 31 degrees? <br><br> A.97<br> B.67<br> C.57 <br> D.87
Alona [7]
The complement of 31° is the angle that when added to 31° forms a right angle (90° ).
6 0
3 years ago
Find the value of x and y.
RideAnS [48]

Answer:

x = 30

y = 2

Step-by-step explanation:

Please note: the value for x is correct only if this triangle is a right triangle.

This can be solved because 2(5y) = 20 and because if a triangle has all congruent angles then its side lengths are also congruent.

4 0
2 years ago
How fast is a car going if it travels 15 meters in 5 seconds?​
scoray [572]

The car is traveling 3 meters second

Step-by-step explanation:

you divide 15 by 5 and you get 3

5 0
3 years ago
Read 2 more answers
a carpenter has been asked to build an open box with a sqaure base. the sides of the box will cost $3 per m^2 and the base will
slamgirl [31]
<h2>Dimension of box is 2 m x 2 m x 1.33 m</h2>

Step-by-step explanation:

Let a be base side and h be the height.

Volume of box, V = a²h

The sides of the box will cost $3 per m² and the base will cost $4 per m². Cost for making is $48.

That is

                 4a² + 3 x 4 x a x h = 48

                 4a² + 12 a x h = 48

                 a² + 3 ah = 12  

                 h=\frac{12-a^2}{3a}

So volume is

                    V=a^2\times \frac{12-a^2}{3a}=4a-\frac{a^3}{3}

At maximum volume we have derivative is zero,

                    dV=4da-3\times \frac{a^2}{3}da\\\\0=4-a^2\\\\a=\pm 2

Negative side is not possible, hence side of square base is 2m.

Substituting in  a² + 3 ah = 12  

                           2² + 3 x  2 x h = 12  

                             h = 1.33 m

Dimension of box is 2 m x 2 m x 1.33 m

5 0
3 years ago
7x-1+6x=90<br> What is the answer?
masya89 [10]
The answer is going to be x=7
4 0
3 years ago
Read 2 more answers
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