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4 years ago

15

Simplify the expression. 6(7n – 5m) + 8m

2 answers:

antiseptic1488 [7]4 years ago

7 0

Answer:

42n-22m

Step-by-step explanation:

1. distribute 6 to 7n and -5m

2. combine like terms

mafiozo [28]4 years ago

6 0

42n-22m is the answer I believe

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an amusement park line is moving about 4 feet every 15 minutes at this rate approximately how long will it take for a person at

Natasha_Volkova [10]

4/15 = 50/x...4 ft to 15 min = 50 ft to x minutes
this is a proportion, so we cross multiply
(4)(x) = (15)(50)
4x = 750
x = 750/4
x = 187.5 minutes or 3 hrs and 7.5 minutes

or u can do it this way..
15/4 = 3.75 ft per minute......50 * 3.75 = 187.5 minutes

3 0

4 years ago

Select the two values of x that are roots of this equation.<br> X2 + 2x - 5 = 0

LenaWriter [7]

Answer:

$x=-1+\sqrt{6 }$

$x=-1-\sqrt{6 }$

Step-by-step explanation:

$x=\frac{-b±\sqrt{b^{2}-4ac } }{2a}$

Ignore the A before the ±. It wouldn't let me type it correctly.

x² + 2x - 5 = 0

a = 1

b = 2

c = - 5

$x=\frac{-2±\sqrt{2^{2}-4((1)(-5)) } }{2(1)}$

$x=\frac{-2±\sqrt{4-4((1)(-5)) } }{2(1)}$

$x=\frac{-2±\sqrt{4+20 } }{2(1)}$

$x=\frac{-2±\sqrt{24 } }{2}$

$x=\frac{-2±\sqrt{(2)(12) } }{2}$

$x=\frac{-2±\sqrt{(2)(2)(6) } }{2}$

$x=\frac{-2±\sqrt{(2)(2)(2)(3) } }{2}$

$x=\frac{-2±(\sqrt{2} )(\sqrt{2})(\sqrt{(2)(3) )} }{2}$

$x=\frac{-2±2\sqrt{6 } }{2}$

Two separate equations

$x=\frac{-2+2\sqrt{6 } }{2}$

$x=\frac{-2-2\sqrt{6 } }{2}$

$x=-1+\sqrt{6 }$

$x=-1-\sqrt{6 }$

7 0

3 years ago

−2x(x+5) for x=−3<br> Idk what this mean plz help

LenKa [72]

-2(3)(x+5)
-6(x+5)
-6x+5
X=-1.2

6 0

3 years ago

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The sum of 5x2y and (2xy2 + x2y) is

Ludmilka [50]

The sum of all three is 6x^2y + 2xy^2

8 0

4 years ago

S=a/1-r for solving for r

denpristay [2]

R = 1 - a/s is your answer

Hope this helped :)

5 0

3 years ago

Read 2 more answers