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Kay [80]
3 years ago
9

Can u pls help I’ll help back I don’t want to fail!!!:(((((((:[

Mathematics
1 answer:
MAVERICK [17]3 years ago
3 0

It looks like the practice ones are all that matter so I'm only going to answer those. If you need the others answered let me know.

1. 5k-9=-3k+7

Add 9 to both sides: 5k-9+9=-3k+7+9

5k=-3k+16

Add 3k to both sides: 5k+3k=-3k+16+3k

(You are adding 3 and 9 instead of subtracting them because in the equation, they are negative numbers and you have to do the opposite operation to get rid of them.)

8k=16

Divide both sides by 8: 8k/8=16/8

k=2

2. 2(w-3)+5=3w-2

Use the distributive property: 2*w-2*3+5=3w-2

2w-6+5=3w-2

Combine like terms: 2w-1=3w-2

Add 1 to both sides: 2w-1+1=3w-2+1

2w=3w-1

Subtract 3w from both sides: 2w-3w=3w-1-3w

-w=-1

Divide both sides by -1: -w/-1=-1/-1

w=1

3. 8t+9=7t+6

Subtract 9 from both sides: 8t+9-9=7t+6-9

8t=7t-3

Subtract 7t from both sides: 8t-7t=7t-3-7t

t=-3

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FrozenT [24]
The value of x is the meaning of the word of the value of x=14
8 0
3 years ago
Find the sum of the $x$-coordinates of all possible positive integer solutions to $\frac1x+\frac1y=\frac17$.
AlexFokin [52]

Answer:

Step-by-step explanation:

So the equation is 1/x+1/y=1/7

Multiplying both sides by 7xy, we get

7y+7x=xy

So x+y=xy/7

Or x=-y+xy/7

So x can be:

1,2,3,4,5,6

7 0
4 years ago
What are the values of a and b?
dangina [55]

Answer:

D

Step-by-step explanation:

These two triangles are similar triangles. The two angles marked are the same and the two angles at the intersection where you see the square are also the same, making it clear that the last angle must be the same as well.

Therefore,

length 8 from the top triangle is similar to length 6 on the bottom triangle,

length 10 from the top is similar to b on the bottom triangle,

length 6 from the top is similar to a on the bottom.

To find the ratio of similarity, you would compare the length 8 to length 6, and divide them. 8/6 = 1.33333

Now that you've found the proportionality constant, you divide the other two lengths on the top triangle with the constant to get <em>b </em> and <em>a</em>.

b = 10/1.3333 = 7.5

a = 6/1.3333 = 4.5

Therefore, the answer is D: a = 9/2, b = 15/2.

7 0
3 years ago
What’s the units?? Plz need help
Sergeu [11.5K]

Answer: 4 units

Step-by-step explanation:

4 0
4 years ago
Which one should I choose?
Nastasia [14]

Given:

A figure of a quadrilateral.

To find:

The measures of angle 1 and angle 2.

Solution:

The given figure has two pairs of congruent adjacent sides. So, the quadrilateral in the figure is a kite.

We know that the diagonals of a kit are perpendicular to each other at the point of intersection.

m\angle 1=90^\circ

According to the angle sum property, the sum of all interior angles of a triangle is 180 degrees.

90^\circ+65^\circ+m\angle 2=180^\circ

155^\circ+m\angle 2=180^\circ

m\angle 2=180^\circ-155^\circ

m\angle 2=25^\circ

Therefore, the correct option is C.

7 0
3 years ago
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