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2 years ago

WILL GIVE BRANILEST ASAP Rocky simplified an expression in three steps, as shown:

Mathematics

1 answer:

Elenna [48]2 years ago

7 0

<span>Step 1, all the exponents are increased by 2 since when squaring a number you have to multiply it to the exponents </span>

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Evaluate the expression for the given values of the variables.

Anna71 [15]

4(-5) + 7(3) + 3(-5) - 2(3) + 2(-5)

-20 + 21 + (-15) - 6 + (-10)

1 + (-15) - 6 + (-10)

(-14) - 6 + (- 10)

-14 + -6 + (-10)

-20 + -10

= -30

the answer is -30

4 0

2 years ago

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In △ RTV , X is the centroid and RU = 18. Find RX and XU. Enter your answers as numbers.

lapo4ka [179]

Answer:

RX = 12 and XU = 6

Step-by-step explanation:

Given : In ΔTRV , TW ,RU and VS are the medians .

X is the centroid

To Find : RX and XU

Solution:

Since we know that the centroid divides each median in a ratio of 2:1.

Since X is the centroid so RX : XU = 2:1

So, let RX = 2x and XU = x

And we are given that RU = 18

⇒RX +XU=18

⇒2x+x=18

⇒3x=18

⇒ $x=\frac{18}{3}$

⇒ $x=6$

Thus, RX = 2x = 2*6 =12

XU = x =6

Hence length of RX = 12 and XU = 6

4 0

2 years ago

In a 30cm by 25cm rectangle, a quadrant of a circle of radius 7cm has been cut away from each corner. What is the perimeter of t

lidiya [134]

Answer:

Perimeter = 98 cm

Area = 596 $cm^{2}$

Step-by-step explanation:

Please refer to the attached image for the resultant figure when a quadrant of circle with radius 7 cm is cut from a rectangle of sides 30 cm and 25 cm.

Perimeter of a figure = Sum of all its sides + Perimeter of circle

Quadrant of a circle is one fourth of a circle and there are 4 such quadrant of a circle, so eventually there is one complete circle in this figure.

The sides of this resultant figure = 30 - 14 = 16 cm

and 25 - 14 = 11 cm

So perimeter of this figure = 16 + 11 + 16 + 11 + Perimeter of circle

$\Rightarrow 54 + 2 \pi r\\\Rightarrow 54 + 2 \times \dfrac{22}{7} \times 7\\\Rightarrow 54 + 44 = 98 cm$

To find area of this figure = Area of rectangle - Area of circle

Area of rectangle = Length $\times$ Width

$\Rightarrow 30 \times 25 = 750\ cm^{2}$

Area of circle = $\pi r^{2}$

$\Rightarrow \dfrac{22}{7} \times 7^{2} = 154\ cm^{2}$

So, area of figure = 750 - 154 = 596 $cm^{2}$

3 0

2 years ago

The electron configuration for Helium (He) is shown below. 1s2 Which diagram shows the correct distribution of electrons in the

AURORKA [14]

Answer:

what is the question comments me

7 0

2 years ago

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What is the point slope form of the line with slope 25 that passes through the point (−4,−7)?

slava [35]

Answer:

y+7=25(x+4)

Step-by-step explanation:

It is + because remember two - - negatives make a positive +. And the original formula is like this y-y=m(x-x), then m represents the slope, so your slope will always go in place of the m. And you can number the it y one - y two = m (x one - x two) if that helps. Hope it did help!!!

7 0

3 years ago