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k0ka [10]
3 years ago
6

Beth sold half of her comic books and then bought nine more she now has 28 how many did she have to start with

Mathematics
1 answer:
allochka39001 [22]3 years ago
8 0
28 - 9 = 19
19 + 19 = 38
she started with 38 comics
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gizmo_the_mogwai [7]

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1 3/8 in one week

Step-by-step explanation:

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Marta put $4.87 in her coin bank. Each day she added 1 quarter, 1 nickel, and 3 pennies. How much money was in her coin bank aft
nignag [31]

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3 years ago
A rectangle has an area of 19.38 cm2. When both the length and width of the rectangle are increased by 1.50 cm, the area of the
Lostsunrise [7]

Answer: 5.7\ cm

Step-by-step explanation:

Given

Rectangle has an area of 19.38\ cm^2

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We can write

\Rightarrow lw=19.38\quad \ldots(i)\\\\\Rightarrow (l+1.5)(w+1.5)=35.28\\\Rightarrow lw+1.5(l+w)+1.5^2=35.28\\\text{use (i) for}\ lw\\\Rightarrow 19.38+1.5(l+w)=35.28-2.25\\\Rightarrow l+w=9.1\quad \ldots(ii)

Substitute the value of width from (ii) in equation (i)

\Rightarrow l(9.1-l)=19.38\\\Rightarrow l^2-9.1l+19.38=0\\\\\Rightarrow l=\dfrac{9.1\pm\sqrt{(-9.1)^2-4(1)(19.38)}}{2\times 1}\\\\\Rightarrow l=\dfrac{9.1\pm\sqrt{5.29}}{2}\\\\\Rightarrow l=\dfrac{9.1\pm2.3}{2}\\\\\Rightarrow l=3.4,\ 5.7

Width corresponding to these lengths

w=5.7,\ 3.4

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8 0
3 years ago
How to find the point-slope form of an equation that passes through two sets of points?
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\frac{y_{2} - y_{1}}{x_{2} - x_{1}}

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\frac{z-c[tex]y-w= \frac{z-x}{y-w} (x-c)}{y-w} [/tex]

Now we can say that we can use the point slope form formula:
y-y_{1}=m(x-x_{1})

Now we can substitute m for the slope, and use any points to plug in x_{1} and y_{1}.

Hope this helps! :^)

6 0
3 years ago
Last Friday Micaela had $33.91. Over the weekend she recieved some money for
Lerok [7]

Answer:

Trevon received  

$

12

for cleaning the attic.

Explanation:

Since Trevon had  

29

on Friday and  

41

now after cleaning the attic over the weekend, the amount he received,  

x

, can be determined by the equation:

x

=

41

−

29

x

=

12

4 0
2 years ago
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