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GaryK [48]
2 years ago
13

Find the solution of the system of equations. 10x + 8y = 42. -8x - 8y = -40​

Mathematics
2 answers:
vagabundo [1.1K]2 years ago
8 0
The answer would be x=1
lidiya [134]2 years ago
6 0
23 I believe but I’m it sure
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Find the missing side. round to the nearest tenth.
horrorfan [7]

Answer:

24) x = 9.2

25) x = 30.8

Step-by-step explanation:

Given

See attachment for triangles

Solving (24)

To solve for x, we make use of cosine formula

i.e.

cos(40) = adjacent ÷ hypotenuse

So, we have:

cos(40) = x ÷ 12

Multiply both sides by 12

12 cos(40) = x

12 * 0.7660 = x

x = 9.2

Solving (25)

To solve for x, we make use of sine formula

i.e.

sin(25) = opposite ÷ hypotenuse

So, we have:

sin(25) = 13 ÷ x

Multiply both sides by

x sin(25) = 13

Divide by sin(25)

x = 13 ÷ sin(25)

Using a calculator

x = 30.8

5 0
2 years ago
I need help....
vredina [299]

Its okay bro, we all failed

7 0
3 years ago
Rock stars Ewe and Eye were both born on Sunday, January 1. When Ewe turned 13 years old Eye could not have been _____ years old
OLEGan [10]
The answer is C because
5 0
3 years ago
Trapezoid QRST has two right angles. A 5in. altitude can be drawn dividing QRST into a rectangle and an isosceles right triangle
iVinArrow [24]
The area of the trapezoid is 57.5 square inches.

If you draw out the description, you will see that your trapezoid can be divided into a rectangle that is 9 x 5 and an isosceles right triangle with a base of 5 and height of 5. 

Just find the areas of both and add them together.

Rectangle:
5 x 9 = 45

Triangle:
0.5 x 5 x 5 = 12.5

45 + 12.5 = 57.5
5 0
3 years ago
Help with this math question please
Pavel [41]
Principal Amount = P = $1600
Interest rate = r = 6.5% = 0.065
Time in years = t = 6

Formula for compound interest is:

A=P e^{rt}

Using the values, we get:

A=1600 e^{0.065*6}=2363.17

Rounding of to nearest hundredth, the balance in the account after 6 years will be $2363.17 
5 0
3 years ago
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