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Step2247 [10]
3 years ago
13

Help please! Solve the proportion for x.

Mathematics
2 answers:
Dovator [93]3 years ago
8 0
1+3x /4= 5/2
1+3x = 5*4/2
1+3x =10
3x =9
x = 3




Paha777 [63]3 years ago
3 0
Make the denominators all the same.

LCM (4;2) = 4

\frac{1+3x}{4} =  \frac{10}{4}

Multiply both fractions for 4 to delete denominators

1+3x = 10

Move know terms to the right with changed sign

3x = 10-1

3x = 9

Since the x is multiplied for 3, divide both terms for 3

3x/3 = 9/3

x = 3
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Solve for a = ____.<br><br> 1. 6<br> 2. 4<br> 3. 9
garik1379 [7]
The answer is 3, or 9
8 0
3 years ago
Need help and will be giving Brainliest
Katena32 [7]

Answer:

x-intercept (s):

For this case h (x) = 0

x2 - 2x - 8 = 0

(x-4) * (x + 2) = 0

x1 = 4

x2 = -2

y-intercept:

For this case x = 0

h (0) = (0)2 - 2 (0) - 8

h (0) = - 8

vertex:

We derive the equation:

h '(x) = x2 - 2x - 8

h (x) = 2x - 2

We match zero:

2x-2 = 0

x = 2/2

x = 1

We evaluate the function for x = 1

h (1) = (1)2 - 2 (1) - 8

h (1) = 1 - 2 - 8

h (1) = -9

The vertex is:

(1, -9)

axis of symmetry of the function:

x = 1

Step-by-step explanation:

hope it helps

6 0
3 years ago
A golfer keeps track of his score for playing nine holes of golf​ (half a normal golf​ round). His mean score is 8080 with a sta
solniwko [45]

Answer:

Therefore the mean and standard deviation of his total score if he plays a full 18 holes are 160 and 11\sqrt2 respectively.

Step-by-step explanation:

Given that,

For the first 9 holes X:

E(X) = 80

SD(X)=13

For the second 9 holes Y:

E(Y) = 80

SD(Y)=13

For the sum W=X+Y, the following properties holds for means , variance and standard deviation :

E(W)=E(X)+E(Y)

     and

V(W)=V(X)+V(Y)

⇒SD²(W)=SD²(X)+SD²(Y)        [ Variance = (standard deviation)²]

\Rightarrow SD(W)=\sqrt{SD^2(X)+SD^2(Y)}

∴E(W)=E(X)+E(Y) = 80 +80=160

            and

∴SD(W)=\sqrt{SD^2(X)+SD^2(Y)}

              =\sqrt{11^2+11^2}

               =\sqrt{2.11^2}

               =11\sqrt2

Therefore the mean and standard deviation of his total score if he plays a full 18 holes are 160 and 11\sqrt2 respectively.

                                               

4 0
3 years ago
It cost $10.50 to buy 3 medium pizzas. How much does it cost to buy 10 medium pizzas?
melomori [17]
It would cost $35 because 10.50 divided by 3 = 3.5x10=35

5 0
3 years ago
Read 2 more answers
What is an equation in point slope form of the line that passes through the point (6,-2) and had a slope of 3
ch4aika [34]

Answer:

y - 6 = 3(x + 2)

Step-by-step explanation:

Point-slope form: y - y1 = m(x - x1)

Given: m(slope) = 3, (6, -2)

(x1, y1) = (6, -2)

Input the given values of the slope and the point into the equation for point-slope form:

y - (-2) = 3(x - 6)

y + 2 = 3(x - 6)

The equation written in point-slope form is: y + 2 = 3(x - 6)

7 0
3 years ago
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