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4 years ago

Nineteen multiplied by twenty five

Mathematics

1 answer:

scoray [572]4 years ago

4 0

Answer:

19*25= 475

Step-by-step explanation:

You can either use a calculator or use the standard operation

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Can someone please help me with this problem? It involves quadratic formula and the answer is (-2,-3) but anytime I try to get t

Anvisha [2.4K]

Answer:

See explanation

Step-by-step explanation:

$2x^2+10x+12=0$

$x=\dfrac{-10\pm\sqrt{100-96}}{4}=\dfrac{-10\pm 2}{4}=\dfrac{-8}{4},\dfrac{-12}{4}=-2,-3$

Hope this helps!

3 0

3 years ago

Chris shoots an arrow up into the air. The height (in feet) of the arrow is given by the function h(t) = - 16t2 + 64t + 112 wher

iris [78.8K]

Answer:

After 2 seconds

Step-by-step explanation:

First step is find an equation of velocity:

h(t)=-16t2+64t+112. The velocity function is derivated from position function, so we should do that.

v(t)= h´(t)= -16*2*t+64 ⇒ v(t)= -32t+64.

Now we know the arrow reach the maximun height when this velocity is equal to zero when t>0.

0=-32t+64 ⇒ 32t=64, split each member for 32 ⇒ $\frac{32t}{32}$ = $\frac{64}{32}$

t=2. That means after 2 sec. the arrow reach the maximum height

6 0

4 years ago

Read 2 more answers

A quadrilateral has vertices at (1,1), (6, 2), (5, 5) and (3, 6). Find the area of the quadrilateral. Please help.

malfutka [58]

First off, plot the vertices. When you finish, you should get the shape of a kite, to prove that it is a kite, find the slope of the line between (1,1) and (5,5), then find the slope of (6,2) and (3,6), if one of the slopes are the reciprocal and negative of the other slope, then the 2 lines are perpendicular to each other. Then, use the distant formula to find the distand between (6,2) - (5,5) and between (3,6) - (5,5). If the two lines are congruent, then you have proven that the shape is indeed a kite. Then, use the distant formula to find the necessary lines and use the kite are formula.

6 0

3 years ago

Which system of equation does the graph represent

alexdok [17]

We cant answer these type of questions if theres no picture of the graph sorry

4 0

3 years ago

Consider the population of four juvenile condors. Their weights in pounds are : 4, 5, 7, 12 (a) Let x be the weight of a juvenil

creativ13 [48]

Answer:

a) 4, 5, 7, 12

b) 7

c) 4.5, 6.5, 8, 6, 8.5, 9.5

d) 7.167

Step-by-step explanation:

We are given the following in the question:

4, 5, 7, 12

a) unique values for x

4, 5, 7, 12

b) mean of the population

$Mean = \displaystyle\frac{\text{Sum of all observations}}{\text{Total number of observation}}$

$\mu =\displaystyle\frac{28}{4} = 7$

c) sampling distribution for samples of size 2

Sample size, n = 2

Possible samples of size 2 are (4,5),(4,7),(4,12),(5,7),(5,12),(7,12)

Sample means are:

$\bar{x_1} = \dfrac{4+5}{2} = 4.5\\\\\bar{x_2} = \dfrac{4+7}{2} = 6.5\\\\\bar{x_3} = \dfrac{4+12}{2} = 8\\\\\bar{x_4} = \dfrac{5+7}{2} = 6\\\\\bar{x_5} = \dfrac{5+12}{2} = 8.5\\\\\bar{x_6} = \dfrac{7+12}{2} = 9.5$

Thus, the list is 4.5, 6.5, 8, 6, 8.5, 9.5

d) mean of the sampling distribution

$\bar{x} = \dfrac{4.5 + 6.5 + 8+ 6 + 8.5+ 9.5}{6} = \dfrac{43}{6} = 7.167$

6 0

3 years ago