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frosja888 [35]
3 years ago
12

What is 2(4 x 9 - 30) + 7(5 x 3 -12)?

Mathematics
2 answers:
Evgesh-ka [11]3 years ago
8 0
8 x 18 - 60 + 35 x 21 - 84
144 - 60 + 735 - 84
84 + 651
735
Leviafan [203]3 years ago
5 0

Answer:

25

Step-by-step explanation:

2((4)(8)-30)+7((5)(3)-12)

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Let's simplify step-by-step.<span><span><span><span>52x</span>+<span><span>43<span>y92</span></span>x</span></span>+<span><span>3<span>y15</span></span>y</span></span>+<span><span><span><span><span><span><span><span><span>8<span>x6</span></span>x</span><span>y23</span></span>x</span><span>y6</span></span>x</span><span>y32</span></span>x</span>y

</span></span><span>=<span><span><span><span>52x</span>+<span><span>43x</span><span>y92</span></span></span>+<span>3<span>y16</span></span></span>+<span><span>8<span>x10</span></span><span>y62

</span></span></span></span>Answer:<span>=<span><span><span><span><span>43x</span><span>y92</span></span>+<span><span>8<span>x10</span></span><span>y62</span></span></span>+<span>3<span>y16</span></span></span>+<span>52<span>x</span></span></span></span>
6 0
3 years ago
What is the average rate of change of the function over the interval x = 0 to x = 8?<br>​
serious [3.7K]

Answer:

The average rate of change is:

\frac{13}{161}

Step-by-step explanation:

The rational function given to us is;

f(x)=\frac{3x+4}{2x+7}

f(0)=\frac{3(0)+4}{2(0)+7}

f(0)=\frac{4}{7}

f(8)=\frac{3(8)+4}{2(8)+7}

f(0)=\frac{28}{23}=1

The average rate of change of this function from x=0 to x=8  is the slope of the secant line connecting:

(0,f(0)) and (8,f(8))

Average rate of change ==\frac{f(8)-f(0)}{8-0}

=\frac{\frac{28}{23}-\frac{4}{7} }{8}

=\frac{13}{161}

7 0
3 years ago
If log_10(x) = 3 + log_10(y), then find x/y
Lina20 [59]

Answer:

  •  1000

Step-by-step explanation:

  • log_{10}x = 3 + log_{10}y
  • log_{10}x - log_{10}y = 3
  • log_{10}(x/y) = 3
  • x/y = 10^3
  • x/y = 1000

7 0
2 years ago
Read 2 more answers
11 + 2(z + 3) -z simplified
lbvjy [14]

Answer: z + 17

Step-by-step explanation:

1) DISTRIBUTE:

11 + 2z + 6 - z

2) COMBINE LIKE TERMS

z + 17

3 0
3 years ago
Read 2 more answers
3. Define a variable, write an equation, and solve the problem. Carla began a
faust18 [17]

Answer:

Carla has been running 7 miles each day for 13 days.

Step-by-step explanation:

Carla ran 3 miles on her first day, 5 miles on her second day and then 7 miles each day onward.

Let the number of days she ran 7 miles each day = x

Total distance run by Carla = 3 + 5 + 7(x)

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If her log book shows that she has run total distance = 99 miles

Equation representing her total run will be,

8 + 7x = 99

7x = 99 - 8

7x = 91

x = \frac{91}{7}

x = 13 days

Therefore, Carla has been running 7 miles each day for 13 days.

3 0
3 years ago
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