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FromTheMoon [43]
3 years ago
10

An equilateral triangle with side length 9 cm is shown in the diagram, work out the area of the triangle.

Mathematics
1 answer:
amid [387]3 years ago
4 0

The answer is 35.1 cm².

Hope this helps; have a great day!

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The point (8,k) lies on the line y=3x-5
Contact [7]

Answer:

x times 5 is 21

Step-by-step explanation:

you times x to 5 and then you will get 21

7 0
3 years ago
HELP PLEASE and help me understand
const2013 [10]

When subtracting a number from a negative (like question one) the subtraction sign will now be an addition sign.

1.

6-(-7)=13

For question 2, its simple subtraction. If you subtract a negative from positive, it'l be a negative.

2.

-3 - 3= -6

3.

-15 - 23 = -38

Now we combine my previous explanations. Subtracting a negative from a negative will be like adding (like in question 4)

4.

-9 - (-5)= -4

5.

5 - (-15)=20

6.

78-(-17)=95


Extra Info:

When adding a number (doesnt matter if positive or negative) to a negative it will turn into subtraction.

Examples:

6+(-9)=-3

-9+(-9)= -18

4 0
3 years ago
Solve<br> x2 - 8x + 14 = 2x - 7
BabaBlast [244]

Answer:

x=7, x=3

Step-by-step explanation:

             x^{2} -8x+14=2x-7

x^{2} -8x-2x+14+7=0

            x^{2} -10x+21=0

\mathrm{For\:a\:quadratic\:equation\:of\:the\:form\:}ax^2+bx+c=0\mathrm{\:the\:solutions\:are\:}

x= \frac{-b\pm \sqrt{b^2-4ac}}{2a}

positive

x=\frac{-\left(-10\right)+\sqrt{\left(-10\right)^2-4\cdot \:1\cdot \:21}}{2\cdot \:1}

x=7

negative

x=\frac{-\left(-10\right)-\sqrt{\left(-10\right)^2-4\cdot \:1\cdot \:21}}{2\cdot \:1}

x=3

7 0
3 years ago
julio says if you subtract 15 from my number and multiply the difference by -7, the result is -42 what is julio number
natali 33 [55]

Answer:

-10

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Cory makes a map of his favorite park, using a coordinate system with units of yards. The old oak tree is at position (3, 7) and
Zinaida [17]

Step-by-step explanation:

.....................

6 0
2 years ago
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