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Natasha2012 [34]
3 years ago
13

PLEASE SOMEONE HELP ME

Mathematics
1 answer:
konstantin123 [22]3 years ago
5 0

Answer:

In this type of question;

The transformation is that how you move same unit together or one side.

Multiplication Property of equality states that  you multiply both sides of an equation by the same number.

(1)

Solve: -24 = \frac{3}{8} n

Using multiplication property of equality.

Multiply both sides of an equation by  \frac{8}{3} ; we have

-24 \times \frac{8}{3} =\frac{3}{8}n \times\frac{8}{3}

Simplify:

-8 \times 8=n

or

n = -64.

Therefore, in this option B is correct.

(2)

Solve: \frac{-7}{3}n=-42

Using multiplication property of equality.

Multiply both sides of an equation by  \frac{-3}{7} ; we have

\frac{-7}{3} \times \frac{-3}{7} =-42 \times \frac{-3}{7}

Simplify:

n= -6 \times -3

or

n =18.

Therefore, the  option A is correct in this question.

(3)

Solve: 2\frac{1}{2} =\frac{-3}{4} m

or we can write this as;

\frac{5}{2} = \frac{-3}{4} m

Using multiplication property of equality.

Multiply both sides of an equation by  \frac{-4}{3} ; we have

\frac{5}{2} \times \frac{-4}{3} = \frac{-3}{4} m\times \frac{-4}{3}

Simplify:

\frac{5 \times -4}{2 \times 3} =m

or

\frac{-10}{3} =m

or

m =\frac{-10}{3} = -3\frac{1}{3}

therefore, the options B is correct in this question

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Need help with this please
Advocard [28]

Answer:

y = 1/2x + 3

Step-by-step explanation:

when X = 0, y = 3

when y = 0, 0 = kx + 3

k = 1/2

8 0
3 years ago
PLEASE HELP QUICKLY!!!!!! ILL GIVE BRAINLIEST
Nikolay [14]

Answer:

Step-by-step explanation:

A.)  x² + 1 = 2x − 3   Make the equation into ax² + bx + c = 0. Subtract 2x on both sides, and add 3 on both sides to set the equation equal to 0

x² + 1 - 2x + 3 = 2x - 2x - 3 + 3

x² - 2x + 4 = 0      

a = 1

b = -2

c = 4    This is not the answer because b = 2 not -2, and c = -4 not 4

B.) x² - 2x − 1 = 3     Subtract 3 on both sides to set the equation = 0

x² - 2x - 4 = 0

a = 1

b = -2

c = -4      This is not the answer because b = 2 not -2

C. x² + 2x - 1 = 3    Subtract 3 on both sides to set the equation = 0

x² + 2x - 4 = 0

a = 1

b = 2

c = -4    This is your answer

D. x² + 2x - 1 = -3      Add 3 on both sides to set the equation = 0

x² + 2x + 2 = 0

a = 1

b = 2

c = 2       This is not the answer because c = -4 not 2

Hope this helps       :)

4 0
3 years ago
You earn $20.00 per hour at your job. If you get a 10% raise at the end of each year, what will your hourly rate, h, be after 8
lesya [120]
The answer is $42.87

h = C(1 +r)^{t}

We know:
C = $20.00
r = 10% = 10%/100% = 0.1
t = 8 years
h = ?

h = 20 * (1 + 0.1)⁸
h = 20 * (1.1)⁸
h = $42.87
6 0
3 years ago
In pentagon $MATHS$, $\angle M \cong \angle T \cong \angle H$ and $\angle A$ is supplementary to $\angle S$. How many degrees ar
gavmur [86]

Answer:

H = 120°

Step-by-step explanation:

The sum of the internal angles of a polygon with n sides is given by the formula:

S = (n-2)*180

So, for a pentagon, we have n = 5, then:

S = (5-2)*180 = 540°

So we have that:

M + A + T + H + S = 540° (eq1)

M = T = H (eq2)

A + S = 180° (eq3)

Using the second and third equation in the first one, we have:

H + H + H + 180 = 540

3H = 360

H = 120°

3 0
4 years ago
Step by step solution help me pls
Ilia_Sergeevich [38]

Step-by-step explanation:

Recall that

1 + \tan^2 x = \sec^2 x

and

\dfrac{d}{dx}(\tan x) = \sec^2 x

so that

\displaystyle \int \tan^2 x = \int (\sec^2 x - 1)dx

\:\:\:\:\:\:\:\:\:=\int \sec^2 xdx - \int dx

\:\:\:\:\:\:\:\:\:=\tan x - x + C

where C is the constant of integration.

6 0
3 years ago
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