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3 years ago

How do you solve 5x-10y=7 X-2y=3

Mathematics

1 answer:

swat323 years ago

8 0

(X-2y)5=(3)5. 5x-10y=7 we - So 5x-10y-5x- 10y=-8
-20y=-8. y=8 over 20

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Write the expression 12^-2 in simplest form.

olga2289 [7]

Answer:

Step-by-step explanation:

1/12^2 = 1/144

8 0

2 years ago

Agora chess club has 16 members and gains a new memeber every month. The key club has 4 members and gains 4 new members every mo

svlad2 [7]

Answer:

For chess club:

y1 = 16 + 1*x where y1=total number of members after x months

For film club

y2 = 4 + 4*x where y2=total number of members after x months

y1 = y2 at

16 + x = 4 + 4x

3x = 12

x = 4

Therefore, after 4 months they the same number of members (equals 20 members, 16 + 1*4 or 4 + 4*4).

3 0

2 years ago

What is the missing numerator?

fgiga [73]

4/5 - /7 =

4/5 - 2/7

5 * 7 = 35

7 * 4 = 28

5 * 2 = 10

28/35 - 10/35 = 18/35

5 0

2 years ago

Read 2 more answers

Anumeha is mowing the lawns for a summer job. For every mowing job, she charges and initial fee of $10 plus a constant fee for e

ExtremeBDS [4]

Answer:

F(t) = 10 +5t

Step-by-step explanation:

Income equals the initial fee plus the hours worked times the hourly rate

We know the initial fee = 10

hours = t

hourly rate =r

F(t) = 10 + r*t

We know a 5 hour job is 35 dollars

35 = 10 + r*5

Subtract 10 from each side

35-10 = 10-10 +5r

25 = 5r

Divide by 5

25/5 = 5r/5

5 =r

The hourly rate is 5

F(t) = 10 +5t

8 0

3 years ago

Which quadratic equation has the roots -1+4i and -1-4i

AysviL [449]

Answer:

Step-by-step explanation:

Solve the quadratic in answer choice C using the quadratic formula:

$x=\frac{-b+/-\sqrt{b^2-4ac} }{2a}$ .

Here a=1, b=2, and c=17.

Substitute and you'll have:

$x=\frac{-b+/-\sqrt{b^2-4ac} }{2a} =\frac{-2+/-\sqrt{(-2)^2-4(1)(17)} }{2(1)}=\frac{-2+/-\sqrt{4-68}}{2)}$

$\frac{-2+/-\sqrt{-64} }{2}=\frac{-2+/-8i }{2}=-1+/- 4i$

6 0

3 years ago