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3 years ago

X-y=11 if x=4 wat is y

1 answer:

4 0

Let's see this original ewuation:
$x-y=11$
1) Substitute 4 in for x: $4-y=11$
2)Subtract 4 from both sides. This cancels out four. $(4-4)-y=11-4$
3)Cancel: $-y=7$
4)Multiply both sides by negative 1: $-1*-y=11*-1 \\ y=-11$

$y=-11$

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How do you write 18 tens in standard form

Liula [17]

1800 because the 18 cant fit in the tens

7 0

3 years ago

T-5 >3(-2+t) please help me

Vladimir79 [104]

Answer:

t < 1/2

Step-by-step explanation:

Isolate the variable by dividing each side by factors that don't contain the variable.

Inequality Form: t < 1/2

Interval Notation: ( -infinity, 1/2)

3 0

3 years ago

Write -12 in the improper fraction form.

nydimaria [60]

Answer:

$\frac{-12}{1}$

Step-by-step explanation:

An Improper Fraction has a top number larger than (or equal to) the bottom number.

To convert a whole number -12 into an improper fraction we can divide the whole number by one to turn it into a temporary fraction.

$\frac{-12}{1}$

Also we could multiply and divide -12 by another number greater than one, for example:

$\frac{-12*2}{1*2} = \frac{-24}{2}$

There are several ways we can write -12 in the improper fraction form.

6 0

3 years ago

I really need help with this please ! I don't understand it, and I have a quiz tomorrow

erik [133]

You can do this by finding a number close to it, and then finding out how to do it.

For example with 63(square root sign), find out what is close to it.

7x7=49 while 8x8=64

Because of this, we now know that it is between 7 and 8 but is also really close to 8.

Our number could be 7.9

Hope this helped!!!

3 0

3 years ago

Use 1/2ab sin C formula pls

Harman [31]

Step-by-step explanation:

$area = \frac{1}{2} a.b \sin(C) \\ from \:cosine \: rule \\ {c}^{2} = {a}^{2} + {b}^{2} - 2a.b \cos(C) \\ 36 = 144 + 81 - (2 \times 12 \times 9) \cos(C) \\ 189 = 216 \cos(C) \\ \cos(C) = 0.875 \\ C = \cos {}^{ - 1} (0.875) \\ C = 28.96 \degree \\ area = \frac{1}{2} \times 144 \times 9 \times \sin(28.96 \degree) \\ area = 313.8 \: sq \: units$

3 0

3 years ago