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Dmitriy789 [7]
3 years ago
6

The sum of three times a and four is the same as five yimes a?

Mathematics
1 answer:
Umnica [9.8K]3 years ago
7 0

\text{the sum of three times a and four}:3a+4\\\\\text{five times a}:5a\\\\The\ equation:\\\\3a+4=5a\qquad\text{subtract 3a from both sides}\\\\4=2a\qquad\text{divide both sides by 2}\\\\2=a\to\boxed{a=2}

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during a flu epidemic,146 students out of 680 who attend Lincoln middle school were absent. what percent were absent?
ra1l [238]
21% were absent, if you divide 146 by 680 and multiply by 100, then round to the nearest whole number, you get 21
5 0
3 years ago
Which of the following equations are equivalent to -2m - 5m - 8 = 3 + (-7) + m?
aleksandrvk [35]
To solve this problem, we must simplify the the equation:
<span>Here is the base equation -2m - 5m - 8 = 3 + (-7) + m (Add all like terms):

</span>#1 -2m - 5m - 8 = 3 + (-7) + m (Property of Addition)<span>
#2 -7m - 8 = -4 + m (Most Simplified Equation)

The answer your would be the 2nd one. </span>-7m - 8 = m - 4
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3 0
3 years ago
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Convert 42 km/h to m/s
Marta_Voda [28]

42 km/h is equal to 0.00724933 m/s

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5 0
3 years ago
Can someone plz help me solved this problem! I’m giving you 10 points! I need help plz help me! Will mark you as brainiest!
sergeinik [125]

Answer:

a). 8(x + a)

b). 8(h + 2x)

Step-by-step explanation:

a). Given function is, f(x) = 8x²

    For x = a,

    f(a) = 8a²

    Now substitute these values in the expression,

    \frac{f(x)-f(a)}{x-a} = \frac{8x^2-8a^2}{x-a}

                  = \frac{8(x^2-a^2)}{(x-a)}

                  = \frac{8(x-a)(x+a)}{(x-a)}

                  = 8(x + a)

b). \frac{f(x+h)-f(x)}{h} = \frac{8(x+h)^2-8x^2}{h}

                      = \frac{8(x^2+h^2+2xh)-8x^2}{h}

                      = \frac{8x^2+8h^2+16xh-8x^2}{h}

                      = (8h + 16x)

                      = 8(h + 2x)

4 0
3 years ago
Problem: – 12 = - Зу
Rzqust [24]

Answer:

4y or 4 (divide)

Step-by-step explanation:

8 0
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