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Makovka662 [10]
4 years ago
6

Which statement is true about the equation 4.5z = 4.5z – 4.25 + 6.25? (1 point) It has no solution. It has one solution. It has

two solutions. It has infinitely many solutions.
Mathematics
1 answer:
MakcuM [25]4 years ago
5 0
I think it would be it has no solutions, because if you solve for z, the z's cancel each out and you would get 0=2 with is not true, so there would not be any solutions.

4.5z=4.5z-4.25+6.25
4.5z-4.5z=-4.25+6.25
   0=2
no solution
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What is the slope of a line perpendicular to the line whose equation is 5x - y = -7.
BARSIC [14]

keeping in mind that perpendicular lines have negative reciprocal slopes, let's check for the slope of the equation above

5x-y=-7\implies 5x-y+7=0 \\\\\\ \stackrel{\stackrel{m}{\downarrow }}{5} x+7=y\qquad \impliedby \begin{array}{|c|ll} \cline{1-1} slope-intercept~form\\ \cline{1-1} \\ y=\underset{y-intercept}{\stackrel{slope\qquad }{\stackrel{\downarrow }{m}x+\underset{\uparrow }{b}}} \\\\ \cline{1-1} \end{array}

so a line perpendicular to that one above will have a slope of

\stackrel{~\hspace{5em}\textit{perpendicular lines have \underline{negative reciprocal} slopes}~\hspace{5em}} {\stackrel{slope}{5\implies \cfrac{5}{1}} ~\hfill \stackrel{reciprocal}{\cfrac{1}{5}} ~\hfill \stackrel{negative~reciprocal}{-\cfrac{1}{5}}}

3 0
2 years ago
Of the volunteers coming into a blood center, 1 in 3 have O+ blood, 1 in 15 have O-, 1 in 3 have A+, and 1 in 16 have A-. The na
Zanzabum

Answer:

Step-by-step explanation:

Given that of  the volunteers coming into a blood center, 1 in 3 have O+ blood, 1 in 15 have O-, 1 in 3 have A+, and 1 in 16 have A-.

i.e. we can say out of the volunteers

O+ = \frac{1}{3} = 0.3333

O-=\frac{1}{15}=0.06667

A+=\frac{1}{3}=0.3333

A-=\frac{1}{16}=0.0625

Total = 0.795833

We can say remaining belong to B or AB.

%he probability that the person selected has________.

a. type O+ blood  = \frac{0.3333}{0.7958} =0.4188

b. type O blood= \frac{0.3333+0.06667}{0.7958} =0.5026

c. type A blood = \frac{0.3333+0.0625}{0.7958} =0.4974

d. neither type A nor type O blood = 1-0.7958\\= 0.2042

8 0
3 years ago
A park charges $12 for 1 round of mini golf and a reduced fee for each additional round played. If Tom paid $47 for 6 rounds of
faltersainse [42]
Set it up as an equation: 12 + 6x = 47
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12 + 6x = 47
12 - 12 + 6x = 47 - 12
6x = 35
x = 35/6
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Brandon completed 1/2 of his homework assignment in 3/4 of an hour. How much of his assignment can he complete in one hour? Plea
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Answer:

3/4

Step-by-step explanation:

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Put -4 ,-8,2,0 in order from least to greatest
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Answer:

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