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3 years ago

Awnser 4. 5. and 6. please

Mathematics

2 answers:

vivado [14]3 years ago

8 0

1 1/4 -3/8 equals 0.875 that's the answer for Number 4

aleksandrvk [35]3 years ago

6 0

1) Your equation is right = 7/8

2) you add up all bolts = 29/8

3) it's 9 x 7/8 = 63/8

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Write and equati9n of a l8ne that passes through (1,-2) and is perpendicular to -4x+7y=21

yarga [219]

Given:

A line passes through (1,-2) and is perpendicular to $-4x+7y=21$ .

To find:

The equation of that line.

Solution:

We have, equation of perpendicular line.

$-4x+7y=21$

Slope of this line is

$m_1=-\dfrac{\text{Coefficient of x}}{\text{Coefficient of y}}$

$m_1=-\dfrac{-4}{7}$

$m_1=\dfrac{4}{7}$

Product of slope of two perpendicular lines is -1.

$m_1\times m_2=-1$

$\dfrac{4}{7}\times m_2=-1$

$m_2=-\dfrac{7}{4}$

Now, slope of required line is $-\dfrac{7}{4}$ and it passes through (1,-2). So, the equation of line is

$y-y_1=m(x-x_1)$

where, m is slope.

$y-(-2)=-\dfrac{7}{4}(x-1)$

$4(y+2)=-7(x-1)$

$4y+8=-7x+7$

$4y+7x=7-8$

$7x+4y=-1$

Therefore, the equation of required line is $7x+4y=-1$ .

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2 years ago

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2 years ago

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Is 7/3 a rational number ?

boyakko [2]

Answer: Yes

Step-by-step explanation: To determine whether 7/3 is a rational number, remember all fractions either positive or negative are rational numbers.

Therefore, 7/3 is a rational number.

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3 years ago

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Answer:

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Step-by-step explanation:

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3 years ago

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alexandr1967 [171]

Answer:

The inequality is

Step-by-step explanation:

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