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3 years ago

7

Help Find kif (2, k) lies on the line with equation 2x + 7y = 41

1 answer:

Maksim231197 [3]3 years ago

4 0

Answer:

i think 11y

Step-by-step explanation:

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What does (- 1.2) × (0.4) equal?

klasskru [66]

The answer is -0.48.

First, you multiply 1.2 to 4 to get 4.8. Then, since the 4 wasn't 4 but 0.4, you have to divide 4.8 by 10 to get 0.48. Finally, since -1.2 is negative, you put a negative sign in front of 0.48 to get -0.48.

7 0

4 years ago

Find the 11th term of the geometric sequence 6, -18, 54

Nataly [62]

I don’t feel like doing it but I we’ll tell you how to do it you multiply it by 3 so 6 x 3 equals 18 just in negative do 18 x 3 equal 54 so every other on is a negative it’s Simone

4 0

3 years ago

X^2 - y^2 = 100

luda_lava [24]

Answer:

20

Step-by-step explanation:

Let's start by rewriting the second equation in terms of "x":

$x+y=5$

Subtract y from both sides:

$x=5-y$

Now, substitute "5-y" for "x" in the first equation:

$(5-y)^2-y^2=100$

Note that:

$(a-b)^2=a^2-2ab+b^2$

$25-10y+y^2-y^2=100$

Cancel out like terms:

$25-10y=100$

Subtract 25 from both sides:

$-10y=75$

Divide both sides by -10

$y=\frac{75}{-10}=\frac{15}{-2}=-\frac{15}{2}$

Now, substitute this value back into either of the equations to solve for x.

$x+y=5\\x-\frac{15}{2}=5\\$

Add 15/2 to both sides:

$x=5+\frac{15}{2}\\x=\frac{10}{2}+\frac{15}{2}\\x=\frac{25}{2}$

Now, find the difference:

$x-y=\frac{25}{2}-(-\frac{15}{2})=\frac{25}{2}+\frac{15}{2}=\frac{40}{2}=20$

8 0

3 years ago

The sum of two times a number and four

Leokris [45]

Twice the sum of a number and 4 is 14. In this case the numbers are added first, and the ANSWER is doubled.

8 0

3 years ago

Marsha orders a secret menu item and gives the cashier $20 to pay for 3 large pretzels The cashier gives her $5.03 in change. Ea

vredina [299]

Answer:

Each pretzel is $4.99

Step-by-step explanation:

20 - 5.03 = 3x

14.97 = 3x

4.99 = x

4 0

3 years ago