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3 years ago

Find the value of x...

Mathematics

1 answer:

9966 [12]3 years ago

7 0

Answer:

x = 23

Step-by-step explanation:

The 38 degree angle and the (6x +4) angle are supplementary which means both have to add up to 180 degrees. 180 - 38 leaves us with 142. When you plug in 23 to x you get (6(23) + 4) 6 times 23 is 138 and 138 plus 4 is 142. Which gives us our answer of x = 23.

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At a local event, the ratio of hamburgers to hot dogs sold is 5:3. The number of hamburgers sold is 275. How many more hamburger

sveticcg [70]

*your
If the ratio is 5:3, then you divide 275 by 5, and then multiply it by 3. If you test the result, you'll find that the ratio fits.

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3 years ago

The question is on the picture

Radda [10]

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Step-by-step explanation:

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3 years ago

The axis of symmetry for the graph of the function f(x)=3x2+bx+4 is x = 3. What is the value of b?

Kobotan [32]

Answer:

A)-18

Step-by-step explanation:

Given a quadratic equation of the form $y=ax^2+bx+c$ , the axis of symmetry is determined by the formula $x=-\frac{b}{2a}$ .

If the axis of symmetry of the equation: $f(x)=3x^2+bx+4$ is 3, then:

a=3, b=?, x=3

$x=-\frac{b}{2a}\\3=-\frac{b}{2*3}\\b=-6X3=-18$

The correct option is A.

7 0

3 years ago

Read 2 more answers

I NEED HELP. Consider the figure below. Find the value of x,y and z

Andrews [41]

Answer:

x= 7

y=9

z=90

Step-by-step explanation:

8x = (9x-7)

8x = 9x-7

8x - 9x= -7

-x= -7

(multiply -1 to each side to make it positive)

x= 7

(5y-11)+(9x-7)=90

5y-11+9(7)-7=90

5y-11+63-7=90

5y+63-18=90

5y+45=90

5y=90-45

5y=45

y=45÷5

y=9

(5y-11)+8x+z=180

5y-11+8x+z=180

5(9)-11+8(7)+z=180

45-11+56+z=180

34+56+z=180

90+z=180

z=180-90

z=90

7 0

3 years ago

A family is taking a picture, with everyone in the family standing in a row. In the family, there are two sets of twins. In how

Wittaler [7]

Answer:

376320.

Step-by-step explanation:

Given:

There are two sets of twins in a family.

Total family member = 9

Solution:

Let family members = AA BB C D E F G

AA and BB are two set of twins .

First of we will find the arrangements of 5 family member ( 9 - 4 = 5 )

No of ways 5 family member can seat = $^{5}P_{5}$

Now, we will find the arrangements of BB.

As given that nobody is sitting next to their twin, means A twins cannot seat together.

Therefore, they can seat in these blank places given below:

......B.......B......C......... D...... E........ F........ G.......... in $^{8}P_{2}$

Similarly, B twins cannot seat together.

Therefore, they can seat in these blank places given below:

......A.......A......C......... D...... E........ F........ G.......... in $^{8}P_{2}$

Total number of arrangements of all family members = $^{5}P_{5}$ $\times$ $^{8}P_{2}$ $\times$ $^{8}P_{2}$

$=\frac{5!}{5-5!} \times\frac{8!}{8-2!} \times\frac{8!}{8-2!}\\=\frac{5!}{0!}\times\frac{8!}{6!} \times\frac{8!}{6!}\\\\=5!\times\frac{8\times7\times6!}{6!} \frac{8\times7\times6!}{6!}$

$=5\times4\times3\times2\times1\times56\times56\\=376320$

Therefore, Total number of arrangements of all family members is 376320.

5 0

4 years ago