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3 years ago

Simplify the expression -3/8 -1/10

Mathematics

1 answer:

SashulF [63]3 years ago

5 0

Answer:

-19/40

Step-by-step explanation:

-19/40

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f(x) = -4x^2+12x-9f(x)=−4x 2 +12x−9f, left parenthesis, x, right parenthesis, equals, minus, 4, x, squared, plus, 12, x, minus,

Olin [163]

Answer:

The graph has only one x-intercept

Step-by-step explanation:

we have

$f(x)=-4x^2+12x-9$

we know that

The discriminant of a quadratic equation of the form

$ax^{2} +bx+c=0$

is equal to

$D=b^{2}-4ac$

in this problem we have

$f(x)=-4x^2+12x-9$

$a=-4\\b=12\\c=-9$

substitute

$D=12^{2}-4(-4)(-9)$

$D=144-144$

$D=0$

The discriminant is zero

That means ----> The quadratic equation has one real solution

The graph has only one x-intercept

3 0

3 years ago

I really need help with this Triangle problem.

julia-pushkina [17]

Answer:

x = 10

y = 20

Step-by-step explanation:

$\tan \: 30 \degree = \frac{x}{10 \sqrt{3} } \\ \\ \frac{1}{ \sqrt{3} } = \frac{x}{10 \sqrt{3} } \\ \\ \sqrt{3} x = 10 \sqrt{3} \\ \\ x = \frac{10 \sqrt{3} }{ \sqrt{3} } \\ \\ x = 10 \\ \\ \cos 30 \degree = \frac{10 \sqrt{3} }{y} \\ \\ \frac{ \sqrt{3} }{2} = \frac{10 \sqrt{3} }{y} \\ \\ y = 10 \sqrt{3} \times \frac{2}{ \sqrt{3} } \\ \\ y = 10 \times 2 \\ \\ y = 20$

4 0

2 years ago

G(x) =2x + 4; Find g(-3)

yuradex [85]

Answer:

$g(-3)=-2$

Step-by-step explanation:

Substitute g(-3) into the function:

$g(-3)=2(-3)+4$

Multiply:

$g(-3)=-6+4$

Add:

$g(-3)=-2$

7 0

2 years ago

Read 2 more answers

Determine if its possible to form a triangle using the set of segments with the given measurement. explain please! 12 m, 5 m, 18

IRINA_888 [86]

Adding together the shorter two sides results in 17 m. If these two sides were laid end to end, the sum of their sides (17 m) would be less than the length of the third side. Thus, NO triangle could be constructed with this set of line segments.

6 0

3 years ago

FitURite garage employs one manager and four fitters. The average (mean) salary for all employees is £18600. If the manager's sa

ollegr [7]

(25,000+4x)/5=18,600
25,000+4x=93,000 (multiply both sides by 5)
4x=68,000 (subtract 25,000 from both sides)
x=17,000 (divide both sides by 4)
Fitters make $17,000 a year

4 0

3 years ago