If they are two positive numbers, do it normally. If there is a negative and a positive, change it to addition and switch the SECOND integer sign. Only works with two integer…s in a subtraction question.

8 0

3 years ago

Evaluate the value of x to 1 d.p<br><br><br> Thank you

Keith_Richards [23]

Answer:

value of x = 2.8

Step-by-step explanation:

By law of cosines,

${a}^{2} = {b}^{2} + {c}^{2} - 2 \times b \times c \times cos(100) \\ {x}^{2} = {13}^{2} + {10}^{2} - (2 \times 13 \times 10 \times cos100) \\ = 169 + 100 - 260 \times 0.862 \\ = 269 - 260 \times 0.862 \\ = 7.758 \\x = \sqrt{7.758 } \\ = 2.785 \\ = approx \: 2.8$

6 0

3 years ago

A line has a slope of -8 and includes the points (-10, 0) and (-9, z). What is the value of Z?

Evgesh-ka [11]

Answer:

Step-by-step explanation:

Let L be the given line, then, with a slope of -8

L : y = -8x + b

where b is to be determined from the included point A(-10,0).

Substitute point A in L to get

0 = -8 (-10) + b

solve to get

b = -80

therefore

L : y = -8x -80

Now substitute B(-9,z) in L

z = -8(-9) - 80 = -8

6 0

3 years ago

Read 2 more answers

Does anyone know What does x equal?

vazorg [7]

The answer is x = 17

2x - 14 = 37 - x
+14 +14

2x = 51 - x
+x +x

3x = 51/3

X = 17

7 0

3 years ago