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3 years ago

13

A species of catfish, can generate up to 350 voltsWrite an inequality to represent the amount of electricity generated by the ca

tfish

1 answer:

vaieri [72.5K]3 years ago

8 0

Catfish≤350 because the catfish cannot generate more than 350 volts.

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Can anyone help with words problems for algebra 1?

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37.)

68-39= 29˙

38.)

29028-282= 28746 ft

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3 years ago

Umm I need help with math

Sunny_sXe [5.5K]

Answer:

Step-by-step explanation:

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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 $19.38\ cm^2$

Suppose rectangle length and width are $l$ and $w$

If each side is increased by $1.50\ cm$

Area becomes $A_2=35.28\ cm^2$

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

$w=5.7,\ 3.4$

Therfore, we can write the length of the longer side is $5.7\ cm$

8 0

2 years ago

You buy a calculator for $65. A 6% sales tax is added.

Vika [28.1K]

T=65$+(65$*.06)
T=65$+3.9$
T=68.9$

4 0

2 years ago

Carol noticed that 7/10 of the children playing soccer were girls. Which statement could be correct?

Maslowich

<span>Carol noticed that 7/10 of the children playing soccer were girls. Which statement could be correct?
A. There were 28 girls and 12 boys playing soccer.
28 : x% = 40 (the total number of children) : 100%
40x = 28 * 100
40x = 2800
x = 2800 / 40
x = 70%
There were 70% of girls in the class.
70 / 100 = 0.7
7/ 10 = 0.7
This is why A is the correct answer.

</span>

7 0

2 years ago