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3 years ago

Which expression is equivalent to 9(y+5)

Mathematics

2 answers:

Marizza181 [45]3 years ago

8 0

Answer:

9y+45

Step-by-step explanation:

9(y+5)

=9*y+9*5

=9y+45

Julli [10]3 years ago

4 0

Answer:

9y+45

Step-by-step explanation:

The expression 9(y+5) can be simplified with multiplication.

9*y=9y and 9*5=45

So the expression 9y+45 is equivalent.

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3 years ago

Read 2 more answers

13....................

Mashcka [7]

13.

(a)

$y=-5x^2+21x-3$

for x = 2:

$y=-5(2)^2+21(2)-3=-20+42-3=19$

for x = 5

$y=-5(5)^2+21(5)-3=-125+105-3=-23$

(b)

The graph is:

(c)

Using the graph:

$\begin{gathered} x=1.8,y=18.6 \\ x=0.548,y=7 \\ x=3.65,y=7 \end{gathered}$ $\begin{gathered} x=1.8 \\ y=-5(1.8)^2+21(1.8)-3=-16.2+37.8-3=18.6 \end{gathered}$ $\begin{gathered} y=7 \\ -5x^2+21x-3=7 \\ -5x^2+21x-10=0 \end{gathered}$

Using the quadratic formula:

$\begin{gathered} x=\frac{-b\pm\sqrt[]{b^2-4ac}}{2a} \\ x=\frac{-21\pm\sqrt[]{21^2-4(-5)(-10)}}{2(-5)} \\ x=\frac{-21\pm\sqrt[]{241}}{-10} \\ x=0.54758 \\ or \\ x=3.6524 \end{gathered}$

6 0

1 year ago

2x + 2y = 6<br> 3x − 2y = 29

Mazyrski [523]

Answer:

x = 7

y = -4

Step-by-step explanation:

5x = 35

x=7

14 + 2y = 6

2y = -8

y = -4

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3 years ago

The distance traveled varies directly with the time spent in motion when speed is held constant.

disa [49]

Answer:

16/3 or 5.3

Step-by-step explanation:

150 miles = 4 hours

Find how long it takes to travel 50 miles(GCF between 150 and 200)

150/3 = 4/3

50 miles = 1 1/3 hours: multiply by 4 to get 200 miles

50 x 4 = 4/3 x 4/1

200 = 16/3

16/3 hours or 5.3

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3 years ago