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fredd [130]
3 years ago
15

If 3 (x+6)= 39, Then x =

Mathematics
1 answer:
Leno4ka [110]3 years ago
8 0
X=7 because 7+6=13 and 3•13=39
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Match the functions to their x-intercepts
Ludmilka [50]
Where are the functions? I can't help unless I can see the problem.
3 0
3 years ago
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For Problems 9-10, simplify the expressions using properties of operations. 9. (4x – 7.2) + (-5.3x-8) 10. (t - 1) – (-7t + 2)
mafiozo [28]

The given expression is : (4x – 7.2) + (-5.3x-8)

Simplify :

Open the brackets :

(4x – 7.2) + (-5.3x-8) = 4x - 7.2 - 5.3x - 8

Arrange the variable and constant terms together :

(4x – 7.2) + (-5.3x-8) = 4x - 5.3x - 8 - 7.2

Solve the variable and constant terms together :

(4x – 7.2) + (-5.3x-8) = - 1.3x - 15.2

Since, the variable and constant term can not solve together so the above equation is the simplest form:

(4x – 7.2) + (-5.3x-8) = - 1.3x - 15.2

Answer : (4x – 7.2) + (-5.3x-8) = - 1.3x - 15.2

7 0
1 year ago
1. Erin hits a golf ball off a tee. The height, yin yards, of the ball off the ground is given by
Sladkaya [172]

Answer:

The maximum height of the ball is 28.2 yards.

Step-by-step explanation:

When we have a quadratic equation in the following format:

y = ax^{2} + bx + c

The maximum value happens when

x = x_{v} = \frac{-b}{2a}

The maximum value will be y(x_{v})

In this problem, we have that:

y = -0.0018x^{2} + 0.45x + 0.05

So

a = -0.0018, b = 0.45, c = 0.05

x = x_{v} = \frac{-b}{2a} = \frac{-0.45}{2*(-0.0018)} = 125

The maximum height is:

y(125) = -0.0018*(125)^{2} + 0.45*125 + 0.05 = 28.2

The maximum height of the ball is 28.2 yards.

4 0
3 years ago
4x^2+2x-5-3x and 6x^2-x+3-2x^2-8<br><br> Are these two expressions equal? Show how you know
aivan3 [116]

Step-by-step explanation:

Simply Equation 1

R. H. S

6x^2 -x +3-2x^2-8

==> 6x^2-2x^2 -x +3-8

==> 4x^2-x-5 .....(1)

Simply equation 2

L. H. S

4x^2+2x-5-3x

==> 4x^2 +2x-3x-5

==> 4x^2-x-5 ....(2)

Since here, RHS = LHS

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hence they are equal.

7 0
3 years ago
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Dmitry [639]

Answer:

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Step-by-step explanation:

Here, we want to factorize the given expression

That would be;

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5 0
3 years ago
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