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3 years ago

Solve the system by substitution -4.5x-2y=-12.5 3.25-y=-0.75

Mathematics

1 answer:

Law Incorporation [45]3 years ago

4 0

I hope this helps you

3,25+0,75=y y=4

-4,5x-2.4=-12,5

-4,5x=-12,5+8

-4,5x=-4,5

x=1

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Lunna [17]

Answer:

Step-by-step explanation:

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3 years ago

(PLEASEE HELPP 24 points)Regina’s work to find the surface area of a square pyramid from its net is shown below. A square pyrami

Fantom [35]

Answer:

She should have used One-half (9.4) (11.9) to represent the area of a single triangle

Step-by-step explanation:

The pyramid is composed by 4 triangles and 1 square

area of the square: base² = 9.4²

area of each triangle = 1/2*base*height = 1/2*9.4*11.9

surface area of the pyramid = 4*area of each triangle + area of the square = 4*(1/2*9.4*11.9) + 9.4²

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4 years ago

Can someone plz help me find the area for this composite figure plzzzz I beg u

Anarel [89]

$S_1 = \frac{a+b}{2}h = \frac{7+9}{2}*5=\frac{18*5}{2}= 9 * 5 = 45~m^2$

$S_\triangle = \frac{ab}{2} = \frac{5*9}{2} = \frac{45}{2} = 22,5~m^2$

$S = S_1 + S_\triangle = 45 + 22,5 = 67,5~m^2$

Answer: 67,5 m².

5 0

3 years ago

Read 2 more answers

one of the fastest cars in the world was recently measured covering 5726 meters in 50 seconds what is the unit rate of speed of

IRISSAK [1]

ANSWER

114.52 meters per second

EXPLANATION

We have that the car covers a distance of 5726 meters in 50 seconds.

To find the speed, we have to use the formula for speed which is:

$\text{Speed = }\frac{dis\tan ce}{time}$

So, the unit rate of speed of the car is:

$\begin{gathered} \text{Speed = }\frac{5726}{50} \\ \text{Speed = 114.52 meters per second} \end{gathered}$

That is the unit rate of speed of the car in meters per second.

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1 year ago

Multiplies to -0.72 and adds to 0.6

Delvig [45]

Multiplies to -0.72 = - 0.6 * (1.2).

Adds to 0.6 =

-0.6 + (1.2) = 1.2 - 0.6 = 0.6.

Hence the two numbers are -0.6 and 1.2.

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4 years ago