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schepotkina [342]
3 years ago
15

Solve the system of linear equations by substitution. x+4y=14 3x+7y=22

Mathematics
2 answers:
natita [175]3 years ago
5 0

Answer:

x=-2

y= 4

Step-by-step explanation:

x=14-4y

42-5y=22

y=4

x=-2

maria [59]3 years ago
4 0
Your answer for the first one will be x=-2 and for the second answer will be y=4
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If an individual saves $5,700 and elects to place the total dollar amount into a savings account earning 2.75% APR compounded mo
Naddika [18.5K]

Answer:

$7,925.53

Step-by-step explanation:

We'll have to use the compound interest formula: A = P(1 + r/n)ⁿˣ

A = final amount (?)

P = starting amount (5700)

r = rate

n = times applied (12 since its monthly and there 12 months in a year)

x = years (12)

A = 5700(1 + 0.0275/12)¹⁴⁴

A = 7925.525498629932

7 0
3 years ago
Jane works twice as fast as her daughter Anna. If it takes 15 minutes to clean the kitchen together, how long would it take Anna
Sonbull [250]
Here, Twice fast means, she takes half time in doing same amount of work.
Let, Anna takes = 2t & Jane takes = t

It would be: 1/t + 1/2t = 1/15
2t + t / 2t² = 1/15
15(3t) = 2t²
2t² = 45t
Divide both sides by t, 
2t = 45
t = 45/2
t = 22.5
& 2t = 22.5(2) = 45

In short, Anna would take 45  minutes

Hope this helps!
7 0
3 years ago
Mohal bought 20 chicken wings for
makvit [3.9K]

Answer:

20 Chicken is $50

we know 10 chicken would be $25. divide

13 chicken would be 30.

4 0
2 years ago
Read 2 more answers
Find the area of the regular decagon if the apothem is 2.8ft and a side is 1.8ft
geniusboy [140]
DECA=10, decagon = 10 sides.

since each side is 1.8 long, all 10 sides will be 10*1.8 or 18 units long, so that'd be the perimeter then,

\bf \textit{area of a regular polygon}\\\\
A=\cfrac{1}{2}ap~~
\begin{cases}
a=apothem\\
p=perimeter\\
------\\
a=2.8\\
p=18
\end{cases}\implies A=\cfrac{1}{2}(2.8)(18)
6 0
3 years ago
Can someone please help?
Helga [31]

Answer:

(-2,1) (-3,0)

Step-by-step explanation:

It hits on the line

7 0
3 years ago
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