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3 years ago

Can you help me plss!!!??

Mathematics

1 answer:

Ratling [72]3 years ago

3 0

Answer:

7 cm should be the correct answer.

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Find an equation of variation where y varies jointly as x and the square of z, and where y=70, when x=21 and z=5.

Bezzdna [24]

Answer:

$y = 181.75xz^2$

Step-by-step explanation:

Given

y jointly varies to x and z^2

Required

Find the equation

We start by writing out the variation;

$y\ \alpha\ xz^2$

Write as equation

$y = kxz^2$

Substitute values of x,y and z

$70 = k * 21 * 25^2$

$70 = k * 21 * 25 * 25$

$70 = k * 13125$

Divide both sides by 7

$\frac{70}{13125} = \frac{k * 131251}{13125}$

$\frac{70}{13125} = k$

$187.5 = k$

$k = 181.75$

Substitute k in $y = kxz^2$

$y = 181.75xz^2$

4 0

3 years ago

Y=4x^2+14x+6 factor the polynomial

Julli [10]

Answer:

−

4 x 2 + 14 x − 6 p -4x2+14x-6p

4 0

3 years ago

What is 15% of 80kg????

attashe74 [19]

Answer:

12 kg

Step-by-step explanation:

15%×80 =

= 15×80/100

= 15×8/10

= 120/10

= 12 kg

7 0

3 years ago

Please send help my way ty :)

galina1969 [7]

Answer:

○ A. Graph C

Step-by-step explanation:

Starting from the y-intercept of $\displaystyle [0, -4],$ you do $\displaystyle \frac{rise}{run}$ by either moving one block south over four blocks west or one block north over four blocks east. Now, you have to figure out which graph follows the inequality symbol in the inequality. In this case, two answer choices match this because the less than inequality will result in a dashed line, so we can automatically eliminate answer choices D. and B.. Now, to figure out our graph once in for all, we need to use the zero-interval test [test point [0, 0]] to ensure if we either shade the opposite portion [the portion that does NOT contain the origin] or the portion that DOES contain the origin. We then need to verify it as false or true: