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lesantik [10]
3 years ago
12

Astronomers classified the planets into six sizes with five atmosphere types and four average temperature ranges. How many diffe

rent planet types are there?
Mathematics
1 answer:
Phoenix [80]3 years ago
4 0
Fire, ice, and inhabitants
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How many solutions does this system of Equations have x-2y=2 y=-2x+5​
gayaneshka [121]

Answer:

One solution: x=2.4, y=0.2

Step-by-step explanation:

x-2y=2

y=-2x+5​

x-2(-2x+5)=2

x+4x-10=2

5x=2+10=12

x=12:5=2.4

y=-2x+5=-2*2.4+5=-4.8+5=0.2

3 0
3 years ago
Rectangles J and K are similar. If the area of rectangle J is 440, what is the area of rectangle K? I need this today
Hunter-Best [27]

Answer:

Area = 27.5

Step-by-step explanation:

Given

J_{Area} = 440

J_{Width} = 22

K_{Width} = 5.5

<em>See attachment</em>

Required

Determine the area of K

First, we need to calculate the length of the rectangle  J

J_{Length} * J_{Width} = J_{Area}

This gives:

J_{Length} * 22 = 440

Divide both sides by 22

\frac{J_{Length} * 22}{22} = \frac{440}{22}

J_{Length} = 20

So, the length of the rectangle J is 20.

Since both shapes are similar, then:

J_{Length} : J_{Width} = K_{Length} : `K_{Width}

Substitute the known values:

20 : 22 = K_{Length} : `5.5

Express as fraction:

\frac{20 }{ 22 }= \frac{K_{Length} }{ `5.5}

Make Length, the subject of formula

K_{Length} = \frac{5.5 * 20}{22}

K_{Length} = \frac{110}{22}

K_{Length} = 5

The area of K is:

Area = K_{Length} * K_{Width

Area = 5.5 * 5

Area = 27.5

4 0
3 years ago
Please Help ;-;
zubka84 [21]

The point-slope form:

y-y_1=m(x-x_1)\\\\m=\dfrac{y_2-y_1}{x_2-x_1}

We have the points (-8, -8) and (-7, 9). Substitute to the formula of a slope:

m=\dfrac{9-(-8)}{-7-(-8)}=\dfrac{17}{1}=17

Put the coordinates of the point (-7, 9) and the value of slope to the point-slope formula:

y-9=17(x-(-7))\\\\\boxed{y-9=17(x+7)}

6 0
3 years ago
Can anyone help me with this question please.
ExtremeBDS [4]

Answer:

see explanation

Step-by-step explanation:

∠ 1 = ∠ 4 ( corresponding angles ), then

∠ 1 = 102°

∠ 2 = ∠ 3 ( corresponding angles ), then

∠ 2 = 78°

5 0
3 years ago
Identify a possible first step using the elimination method to solve the system and then find the solution to the system. 3x + 2
valentinak56 [21]
B. multiply 1st equation by -2, solution (2,9).<span />
3 0
3 years ago
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