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3 years ago

Math I NEED HELP LOOK AT THE IMAGE ALGEBRA IS KILLING ME

Mathematics

2 answers:

HACTEHA [7]3 years ago

4 0

Answer:

4.8

Step-by-step explanation:

1% of 40 is 0.4.

So, just multiply 0.4 by 12 to get 4.8

Murrr4er [49]3 years ago

4 0

Answer:

4.8

40/100*12 = 4.8

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Can someone answer this question please?

Leni [432]

Answer:

b $\leq$ -28/9

Step-by-step explanation:

5+9b $\leq$ -23

5+9b=-23

9b=-28

b=-28/9

4 0

3 years ago

What are the solutions of the equation 2x² = 18? Use a graph of the related function.

Dmitriy789 [7]

Answer:

x=3

Step-by-step explanation:

2x^2= 18

divide the two by 18 —- x^2=9

now x *x= 9 or the square root of 9

3 0

4 years ago

What is the greatest common factor of 30 and 18

Ede4ka [16]

The answer should be 2*3

7 0

3 years ago

How do you solve 4x 5y = -7 and 3x - 6y = 24 using matrices?

solniwko [45]

Aw yis

take the coefients and put them in rows

$\left[\begin{array}{ccc}4&5&|-7\\3&-6&|24\end{array}\right]$
divide 2nd row by 3
$\left[\begin{array}{ccc}4&5&|-7\\1&-2&|8\end{array}\right]$
multiply 2nd row by -4 and add to top one
$\left[\begin{array}{ccc}0&13&|-39\\1&-2&|8\end{array}\right]$
divide top row by 13
$\left[\begin{array}{ccc}0&1&|-3\\1&-2&|8\end{array}\right]$
multiply top row by 2 and add to bottom row
$\left[\begin{array}{ccc}0&1&|-3\\1&0&|2\end{array}\right]$

x=2
y=-3

6 0

3 years ago

Select the correct answer from each drop-down menu.

Oksi-84 [34.3K]

Answer:

$we \: have \: ohms \: law \: h = {i}^{2} rt \\ \frac{h}{t} = {i}^{2} rt \div t = p \\ p = {i}^{2} r....(1) \\ we \: have \: v = ir \\ i = \frac{v}{r} .....(2) \\ put \: (2) \: in \: (1) \\ then \: p = { (\frac{v}{r}) }^{2} r \\ p = \frac{ {v}^{2} }{r} \\ v = \sqrt{pr} = {(pr)}^{ \frac{1}{2} } \\ 2) \\ here \: r = 32 \: and \: p = .5 \\ then \: v = \sqrt{32 \times .5} \\ = \sqrt{16} = 4volt \\ thank \: you$

6 0

3 years ago