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11111nata11111 [884]
3 years ago
12

Solve the equation r²-4s+s²=8r+2s=28​

Mathematics
1 answer:
Diano4ka-milaya [45]3 years ago
5 0

Answer:

{r}^{2}  - 4s +  {s}^{2}  = 8r + 2s = 28 \\  \\ r =  \frac{24}{5 }  - i   \frac{ \sqrt[4]{129} }{5}  \\ \: s =  \frac{58}{5}  +    i \frac{ \sqrt[2]{129} }{5 }  \\  \\ r =  \frac{24}{5}  + i  \frac{ \sqrt[4]{129} }{5}  \\ s =  \frac{58}{5}  - i \frac{ \sqrt[2]{129} }{5}

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Jaun has 105 feet of rope he needs to cut into sections 7/8 feet long . how many sections can be cut
AVprozaik [17]

The answer is 120 sections.

Here's an explanation:

The rope is 105 feet long, and each section needs to be 7/8 feet. So to find the number of sections, you need to divide 105 by 7/8. 105 divided by 7/8 gives you the quotient 120. So there are 120 sections.

5 0
3 years ago
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rodikova [14]

Answer:

9) Domain: 0≤x≤6

Range: -3≤y≤3

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Range: -∞≤y≤∞

11) Domain: -∞≤x≤∞

Range: y≥-2

13) Domain: -∞≤x≤∞

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Step-by-step explanation:

9) Domain: 0≤x≤6

Range: -3≤y≤3

10) Domain: -∞<x<∞

Range: -∞<y<∞

11) Domain: -∞<x<∞

Range: y≥-2

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4 0
3 years ago
For males in a certain town, the systolic blood pressure is normally distributed with a
GREYUIT [131]

Answer:

99.7%

Step-by-step explanation:

Note that 92 and 128 are 3 standard deviations from the mean

The emperical rule or the  68–95–99.7 rule states that 68% of outcomes are wihtin 1 standard deviation from the mean

95% of outcomes are within 2 standard deviations from the mean

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7 0
3 years ago
A man purchased a magazine at the airport for $2.69. The tax on the purchase was $0.13. What is the tax rate at the airport? The
alexdok [17]

We need to find the percent, let's start but making the equation.

The price is 2.69

The tax cost is 0.13

So what percent of 2.69 is = 0.13.

Equation: X/100 x 2.69 = 0.13

Multiply each side by 100 so we can get x alone with the price: 2.69x = 13

Now to get x alone, we must divide both sides by 2.69: x = 4.8

Finally, we just round 4.8 to the nearest whole number, which is 5 (5 or above give it a shove, 4 or below let it go, we have 8 so we give it a shove). This means that the answer will be 5%.

I hope this helps! :)

6 0
3 years ago
How many distinct triangles can be formed for which m∠E = 64°, g = 9, and e = 10?
zysi [14]

Answer:

1) one

2) zero

Step-by-step explanation:

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sinG = 0.8089146417

G = 53.99

j/sinJ = k/sinK

3/sin129 = 8/sinK

sinK = 2.072389241

3 0
3 years ago
Read 2 more answers
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