MATHEMATICS HIGH SCHOOL

PLEASE HELP ME!!!!!!!!! I'LL MARK YOU BRAINLIEST IF YOU ANSWER THESE CORRECTLY!Find the value of x

Answers

Answer 1

Answer:

Answer:

question 4 ... x = -11

question 5.... x = -7

question 6... x = 12

question 7.... x = 10

Step-by-step explanation:

number 4

note : the total angle of a triangle is 180 degrees

hence solve this by creating an equation

x + 51 + 60 + 80 = 180

x = 180 - 80 -60-51

x = -11

number 5

note : the total angle of a triangle is 180 degrees

hence solve this by creating an equation

remember that a right angle is 90 degrees

45 + 52+x + 90 = 180

x = 180 - 90 -52 -45

x = -7

number 6

note : the total angle of a triangle is 180 degrees

hence you can solve this by creating an equation

53 + 39+ 4+7x = 180

now make x the subject of the equation

7x = 180 - 53 - 39 - 4

7x = 84

x = 84/7

x = 12

number 7

note : the total angle of a triangle is 180 degrees

hence solve this by creating an equation

6x - 5 + 5x + 75 = 180

now make x the subject of the equation

6x +5x = 180 - 75 + 5

11x = 110

x = 110/11

x= 10

Answer 2

Answer: As the angles of the triangle are equal to 180
Therefore,
180=53+39+4+7x
180-96=7x
84=7x
X=12
Part 2
180=5x+6x-5+75
180-70=11x
110=11x
X=10
This is for page 1 questions

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The diameter of a circle is 21 inches. Find the area of the circle. (Use 22/7 as the approximation of pi.)

Answers

Step-by-step explanation:

Area of a circle is pi times r-square

$\pi \: {r}^(2)$

So...

$(22)/(7) * (21)/(2) * (21)/(2) = \frac{22 * {21}^(2) }{28}$

Do the rest yourself, my calculator and pen are not handy.Sorry

Calculate the x and f(x) intercepts of f(x) = 3x 2 − 12.

Answers

Answer:

-6

and there you have it plain and simple

Answer:

see explanation

Step-by-step explanation:

To find the x- intercepts let f(x) = 0, that is

3x² - 12 = 0 ( add 12 to both sides )

3x² = 12 ( divide both sides by 3 )

x² = 4 ( take the square root of both sides )

x = ± $√(4)$ = ± 2

Thus x- intercepts are at (- 2, 0 ) and (2, 0 )

To find the y- intercept (f(x)) let x = 0, thus

f(0) = 3 × 0² - 12 = 0 - 12 = - 12

Thus y- intercept at (0, - 12 )

Clara played a video game with three levels. It took her 2 hours and 25 minutes to beat the first level and 2 hours and 25 minutes to beat the second level. Clara played the final level for 1 hour and 50 minutes to finish the game. She beat the final level and stopped playing at 5:20 pm . What time did Clara start playing the game

Answers

Answer: 11:40 am

Step-by-step explanation:

Step 1: we are going to add all the hours she played so these are the hours:

1st level: 2hours and 25min

2nd level: 2hours and 25min

3rd level: 1hour and 50min

When we add these this equals 5hours and 40min.

Step 2: Now we are going to subtract the hours so 5:20pm minus 5hours and 40min is 11:40am

Therefore Clara started playing video games at 11:40am

I need help with this please help me !

Answers

Answer:

The value of x is 13.5 units.

Step-by-step explanation:

You can also apply this formula :

$(a)/( \sin(A) ) = (b)/( \sin(B)) = (c)/( \sin(C) )$

So for this question :

$(x)/( \sin(34) ) = (11)/( \sin(27) )$

$x = (11)/( \sin(27) ) * \sin(34)$

$x = 13.5 \: units \: (near.tenth)$

A triangle has two sides of length 5 and 12. what value could the length of the third side be? More then one can be correct.a.7
b.5
c.19
d.17
e.11
f.9

Answers

$Condition\ for\ existing\ triangle\n\n a,b,c- sides\ of\ triangle\n\n a+b>c\na+c>b\nb+c>a\n 5+12=17\n\n a)\ 7<5+12,\ 5+7>12 \ , 7+12>5 \n b)\ 5<5+12,\ \ 5+5\not>12\nc)19\not<5+12\nd)17\not<5+12\ne)11<12+5,\ \ 11+5>12,\ 11+12>5 \nf)9<12+5,\ \9+5>12\ \ 12+9>5 \n\Third \side\ can\ be\ a,e,f$

A worker has a gross wage of $560 per week and deductions of ; $180 loan repayments, $145.60 tax,

Answers

Gross wage = 560
loan repayments = 180
tax = 145.60

Net gross wage = 560 - [ 180+145.60 ]
= 560 - 325.6
= 234.4