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4 years ago

Helppppppppp mathhhh

Mathematics

2 answers:

nadezda [96]4 years ago

6 0

Tan (x) = 0.8. To calculate the angle x, find the tan⁻¹ (0.8) = 38.7°

antoniya [11.8K]4 years ago

4 0

Tangent of angle = 0.8
Let the angle be Q
Tan Q = 0.8
Q = tan^-1 (0.8)
= 37.6598
= 37.7 (to nearest tenth)

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Select the correct answer from each drop-down menu.

Rufina [12.5K]

Incomplete question. The completed question reads;

The Northville School Board has proposed this budget for the upcoming school year:

20% for school staff’s salaries

50% for school maintenance and upkeep

10% to refurbish the gymnasium

5% to upgrade the computer lab hardware

10% for new instruments for the music department

5% for new sports equipment

After a brief discussion, the school board revised the budget as follows:

20% for school staff’s salaries

50% for school maintenance and upkeep

10% to refurbish the gymnasium

10% to upgrade the computer lab hardware

5% for new instruments for the music department

5% for new sports equipment

In this case, the opportunity cost for (refurbishing the gym, upgrading the computer lab, or getting new instruments.) was ( upgrading the new computer lab hardware, getting new equipment, or getting new instruments?

Answer:

<u>getting new instrument</u>

Explanation:

Note that the term opportunity cost refers to the value or the cost of not selecting/benefitting from the other alternative option.

Comparing both budgets, it is observable that the budget for computer lab hardware was increased by 5%; and that of musical instruments was reduced by 5% according to The Northville School Board order of preference (importance).

Thus, we can say that the board decided to forgo some of the amount spent on musical instruments, but decided to increase spending on computer hardware.

8 0

3 years ago

A chemist is using 334 milliliters of a solution of acid and water. If 19.9% of the solution is acid, how many milliliters of ac

aivan3 [116]

Answer:

Olá, tudo bem?

Step-by-step explanation:

Meu nome é Ana Kesia, e o seu??

Foi mal, Nn consegui responder sua pergunta!

Obrigada pelos pontos mesmo assim!

Qualquer Dúvidas, estou aqui para te ajudar!

Tchau, tenha uma Ótima tarde.♥♥

7 0

3 years ago

2 times a number decreased by 2 is 38. What is the number?

iogann1982 [59]

20

2 x 20= 40 - 2= 38

i think that’s right?

7 0

3 years ago

Read 2 more answers

A circle has centre (3,0) and radius 5. The line y = 2x + k intersects the circle in two points. Find the set

lara [203]

A circle with center $(3,0)$ and radius $5$ has equation

$(x-3)^2+y^2=25 \iff x^2 + y^2- 6 x = 16$

If we substitute $y=2x+k$ in this equation, we have

$x^2+(2x+k)^2-6x=16 \iff 5x^2+(4k-6)x+k^2-16=0$

This equation has two solutions (i.e. the line intersects the circle in two points) if and only if the determinant is greater than zero:

$\Delta=b^2-4ac=(4k-6)^2-4\cdot 5\cdot (k^2-16)>0$

The expression simplifies to

$-4 (k^2 + 12 k - 89)>0 \iff k^2 + 12 k - 89$

The solutions to the associated equation are

$k^2 + 12 k - 89=0 \iff k=-6\pm 5\sqrt{5}$

So, the parabola is negative between the two solutions:

$-6-5\sqrt{5}$

8 0

4 years ago

What is the general form of the equation of a circle with center at (a, b) and radius of length m?

pochemuha

The equation of a circle with center (h,k) and radius r is
$(x-h)^2+(y-k)^2=r^2$

convert it to that form by comleting the square for the x and y terms
or, we can just expand what we know

expand $(x-a)^2+(y-b)^2=m^2$ and make it equal to 0
so expanding we get
$x^2-2ax+a^2+y^2-2by+b^2=m^2$
minus m^2 from both sides
$x^2-2ax+a^2+y^2-2by+b^2-m^2=0$
arranging in decreasing power order with m² at the end
$x^2+y^2-2ax+-2by+a^2+b^2-m^2=0$
that is option A

answer is A

8 0

4 years ago