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Rina8888 [55]
3 years ago
13

Simultaneous Equations 2x+4y=22 2x+2y=15

Mathematics
1 answer:
Aleks04 [339]3 years ago
5 0

Answer:

x = 4

y = \frac{7}{2}

Step-by-step explanation:

Ummmm

I'm not sure if this is corrrect but this is what I got

So first you solve 2x+4y=22 to find x

and you get x = -2y+11

Then you have to subtitute -2y+11 for x in 2x+2y=15

which you then get y= \frac{7}{2}

After you have to subttitute y= \frac{7}{2}  for y in x = -2y+11

which you get as x=4

Finally you get the answer as:

x = 4

y = \frac{7}{2}

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Solve step by step solution then only i can do it plxx ​
Anuta_ua [19.1K]

Answer:

<h3><u>Let's</u><u> </u><u>understand the concept</u><u>:</u><u>-</u></h3>

Here angle B is 90°

So \triangle ABC and \triangle ABD Are right angled triangle

So we use Pythagoras thereon for solution

<h3><u>Required Answer</u><u>:</u><u>-</u></h3>
  • First in triangle ABC

perpendicular=p=8cm

Hypontenuse =h =10cm

  • We need to find base=b

According to Pythagoras thereon

{\boxed{\sf b^2=h^2-p^2}}

  • Substitutethe values

\longrightarrow\sf b^2=10^2-p^2

\longrightarrow\sf b={\sqrt {10^2-8^2}}

\longrightarrow\sf b={\sqrt{100-64}}

\longrightarrow\bf b={\sqrt {36}}

\longrightarrow\sf b=6

\therefore\overline{BC}=6cm

  • BD=BC+CD

\longrightarrowBD=9+6

\longrightarrowBD=15cm

  • Now in \triangle ABD

Perpendicular=p=8cm

Base =b=15cm

  • We need to find Hypontenuse =AD(x)

According to Pythagoras thereon

{\boxed {\sf h^2=p^2+b^2}}

  • Substitute the values

\longrightarrow\sf h^2=8^2+15^2

\longrightarrow\sf h={\sqrt {8^2+15^2}}

\longrightarrow\sf h={\sqrt {64+225}}

\longrightarrow\sf h={\sqrt {289}}

\longrightarrow\sf h=17cm

\therefore{\underline{\boxed{\bf x=17cm}}}

3 0
3 years ago
Product A sells 3.5 times more than Product B. Product B sells 40% less than Product C. Product C sold 39,000 units this month.
Rashid [163]

Answer:

81,900 units of Product A

Step-by-step explanation:

Product C:  39,000

Product B:  [39,000 - (39000 x .40)] = 39,000 - 15,600 → 23,400

Product A:  23,400 x 3.5 = 81,900

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2 years ago
A group of penguins swam 4/5 miles in 1/3 hours. How many miles did the penguins swim in one hour is they swam at about the same
vampirchik [111]

Answer: 2.4 miles, multiply .8 by 3

8 0
3 years ago
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irina [24]
69 is the correct answer
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4 years ago
Find the y-intercept of a line that has a slope of -2 and passes through the point (2,8)
11111nata11111 [884]
Given point (2,8) and slope, we can use slope intercept form.

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Where, y=mx+b, b is the y intercept.

In this case, the intercept is 12.
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