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natulia [17]
3 years ago
13

Find the value of x Show your work

Mathematics
1 answer:
9966 [12]3 years ago
5 0

Answer:

x = 13

Step-by-step explanation:

These angles are vertical which means they’re EQUAL to each other:

6x + 3 = 81

6x = 81 - 3

6x = 78

x = 13

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Charlie saves $21.45 each month for 6 months.In the seventh month, he only saves $10.60.How much money will Charlie have after 7
Tomtit [17]
$21.45 x 6 = $128.7
$128.7 + $10.60 = $139.3

Charlie will have saved $139.3 in 7 months
8 0
3 years ago
8x^2+18x-5=0 find the discriminant
Shalnov [3]
The formula for the discriminant is the square root of b^2 - 4ac

8x^2+18x-5= 0

a = 8, b=18, c= -5

Square root of 324 +160

Square root of 484 = 22                The discriminant is 22


7 0
3 years ago
What is the value of ( 0.4) ^3
cestrela7 [59]

Answer:

0.064

Step-by-step explanation:

( 0.4) ^3

Solution :

( 0.4) ^3

= 0.4 x 0.4 x 0.4

= 0.064

8 0
3 years ago
On Saturday, the Gomez family left home to a resort in Maine. The drove at an average rate of 48 mph. ON Thursday they went back
tankabanditka [31]
If we set the unknown distance (in miles) as x, then we set up an equation according to the data, we can solve for x.

Time taken to go to resort : x/48
Time taken to return : x/40
Total time = x/48+x/40 = 11
Solve for x
common multiple between 48 and 40 = 240
so 
5x/240 + 6x/240 = 11
(5x+6x)/240 = 11
11x  = 11*240, => x=240
Distance from home to resort is 240 miles
4 0
3 years ago
Find the surface area of the right prism:
REY [17]

Answer:

A) 200 in²

Step-by-step explanation:

Height of the front rectangle

sqrt(6² + 6²)

6sqrt(2)

3 rectangles + 2 triangles

(6×8) + (6×8) + (8×6sqrt(2)) + (2×½×6×6)

132 + 48sqrt(2)

199.8822509939

8 0
3 years ago
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