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AVprozaik [17]
3 years ago
13

Please solve this dont give stupid answer for credit.....

Mathematics
1 answer:
mart [117]3 years ago
6 0

(i)

∠BAD + ∠ABD + ∠ADB = 180 <em>the sum of the angles of a triangle equals 180°</em>

70 + 50 + ∠ADB = 180 <em>substituted given information</em>

∠ADB = 60 <em>subtraction property (subtracted 70 and 50)</em>

∠ABD + ∠BDC = ∠ADC <em>angle addition property</em>

60 + ∠BDC = 80 <em>substituted solved and given information</em>

∠BDC = 20 <em>subtraction property</em>

(ii) SORRY but I'm not sure how to find ∠BCD. If ∠ADC = ∠ABC, then ∠DBC = 30. We already calculated ∠BDC = 20, which means that ∠BCD = 130

(iii)

∠BCA = ∠ADB <em>given as a hint</em>

∠BCA = 60 <em>substituted ∠ADB that was solved in part (i)</em>

Answer: (i) = 20, (ii) = 130?, (iii) = 60

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I really need help with the last one if you could help it would be awesome! Tysm.
gladu [14]

it’s the second one..................

5 0
2 years ago
The height "h" of a ball thrown straight up with a velocity of 88 ft/s is given by h = -16t^2 + 88t where "t" is the time it is
Dvinal [7]

By definition of the zeros of ta quadratic function,  for 5.5 seconds the ball is in the air before it hits the ground.

<h3>Zeros of a function</h3>

The points where a polynomial function crosses the axis of the independent term (x) represent the so-called zeros of the function.

That is, the zeros represent the roots of the polynomial equation that is obtained by making f(x)=0.

In summary, the roots or zeros of the quadratic function are those values ​​of x for which the expression is equal to 0. Graphically, the roots correspond to the abscissa of the points where the parabola intersects the x-axis.

<h3>Time the ball is in the air before it hits the ground</h3>

In this case, the height "h" of a ball thrown straight up with a velocity of 88 ft/s is given by h = -16t² + 88t, where "t" is the time it is in the air.

When the ball hits he ground, he height h has a value of zero. This is h=0. Replacing in the previous expression for the height you get:

0= -16t² + 88t

It can be solved by extracting the term "t" as a common factor:

0= t×(-16t + 88)

The Zero Product Principle says that if the product of two numbers is 0, then at least one of the factors is 0. Then:

t= 0

or

0= -16t + 88

Solving: -88= -16t

(-88)÷ (-16)=t

<u><em>5.5= t</em></u>

Finally, this means that for 5.5 seconds the ball is in the air before it hits the ground.

Learn more about the zeros of a quadratic function:

brainly.com/question/12649112

brainly.com/question/21320065

brainly.com/question/12037466

#SPJ1

3 0
2 years ago
Which is the graph of the function f(x) = x2 + 2x + 3?
blagie [28]
Dy/dx=2x+2

So velocity will be zero when 2x+2=0, x=-1

Since d2y/dx2=2, it has a constant positive acceleration of 2, so that when dy/dx=0 it is at an absolute minimum value for f(x), which is also the vertex.

y(-1)=1-2+3=2

So the vertex is at (-1,2), which is an absolute minimum so the parabola opens upwards.

And by symmetry we can say that f(0)=f(-2)=3 so you have another two points that you can see (-2,3) and (0,3)
5 0
3 years ago
Read 2 more answers
Wnite and graph an inequality for the given solution set .<br> {x | x &lt; 7}
Svetradugi [14.3K]

Answer:

im not in high school sorry

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Please help i can not figure it out
Alisiya [41]
To solve this problem you need to figure out the volume of the sipping container, and the volume of the tissue box. 
39*19.5*19.5=14,829.75
6.5*6.5*6.5=274.63

In order to figure out how many fits you need to divide
14,829.75/274.63=53.99

The maximum number that you can fit is the box is 53.

Hope this helps
4 0
3 years ago
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