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3 years ago

What is the value of the expression m^2 + 3m when m=4

Mathematics

1 answer:

givi [52]3 years ago

3 0

4^2+3(4)=28 hope this helps

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Shane's age is 8 years more than three times Edward's age. Their combined age is 56 years.

natima [27]

24 the answr is 24 this was mad easy

4 0

2 years ago

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Solve for x<br> (1/x) -2/3 = (4x)

Vadim26 [7]

The value of x is $x=\frac{-1+\sqrt{37}}{12}$ and $x=\frac{-1-\sqrt{37}}{12}$

Step-by-step explanation:

The equation is $\frac{1}{x}-\frac{2}{3}=4 x$

Subtracting by $4x$ on both sides,

$\frac{1}{x}-\frac{2}{3}-4 x=0$

Taking LCM,

$\frac{3-12 x^{2}-2 x}{3 x}=0$

Multiplying by 3x on both sides,

$-12 x^{2}-2 x+3=0$

Dividing by (-) on both sides,

$12 x^{2}+2 x-3=0$

Using quadratic formula, we can solve for x.

$\begin{aligned}x &=\frac{-2 \pm \sqrt{2^{2}-4 \cdot 12 \cdot(-3)}}{2 \cdot 12} \\&=\frac{-2 \pm \sqrt{4+144}}{2 \cdot 144} \\&=\frac{-2 \pm \sqrt{148}}{24} \\&=\frac{-2 \pm 2 \sqrt{37}}{24}\end{aligned}$

Taking out common term 2, we get,

$\begin{array}{l}{x=\frac{-2(1 \pm \sqrt{37})}{24}} \\{x=\frac{-1 \pm \sqrt{37}}{12}}\end{array}$

Thus, the value of x is $x=\frac{-1+\sqrt{37}}{12}$ and $x=\frac{-1-\sqrt{37}}{12}$

4 0

3 years ago

A line with a slope of 3 passes through (2,5). Which choice is an equation of this line?

damaskus [11]

The point-slope form of the equation of a line of slope m through point (h, k) is given by

... y - k = m(x - h)

Substituting your given values, you have ...

... B. y - 5 = 3(x - 2)

6 0

3 years ago

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Help!! i need help asap

umka21 [38]

Y = mx + b
y = -4x -2

trying option 1

-8x + 2y = -4

2y = -4 + 8x

y = -2 + 4x

so its incorrect

Now trying option 2

8x + 2y = -4

2y = -4 - 8x

y = -2 - 4x

y = -4x -2

so Option B is correct

7 0

3 years ago

Multiply. Write your answer in simplest form. 3/8 x 5/7

Lunna [17]

Answer:

15/56

Step-by-step explanation:

3*5=15 * 8*7=56

15/56

6 0

3 years ago

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