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Natasha_Volkova [10]
3 years ago
13

WILL MARK BRAINLIEST!

Mathematics
2 answers:
nadya68 [22]3 years ago
4 0

Answer:

Step-by-step explanation:

-5x-y=5     since its substitution, take the equation that has the    variables on

x=7y-1         opposite sides(x-7y-1) and sub in whats on the opposite side of the        

-5(7y -1)-y=5    equal sign (7y-1) in for the x variable in the first equation

-35y+5-y=5.  then you distribute the -5 to every value in the parenthesis

-36y=0          then you isolate the remaining variable on one side

y=0               then divide until the variable has no coefficiant

-5x-0=5         then you plug that value back in to the first equation

-5x=5            isolate the variable again

x=-1               then divide again. your y value is 0 and your x value is -1

SVEN [57.7K]3 years ago
3 0

Answer: x = - 1 and y = 0

Step-by-step explanation:

I've attached the answer

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hodyreva [135]

Answer:

B. 14 square feet

Step-by-step explanation:

just took the test

7 0
3 years ago
Please help me asap. No links please <br> 8th Grade
Gennadij [26K]

Answer:

Option P √2.5²-1.2²

Step-by-step explanation:

a = distance between Toby's House and the playground = 1.2 inches

b = distance between the playground and Toby's Friend's House = unknown

c = distance between Toby's House and Toby's Friend's House = 2.5 inches

Use the Pythagorean Theorem to calculate the side length of b:

a²+b²=c²

b²=c²-a²

b=√(c²-a²)

b=√(2.5²-1.2²)

Therefore, option P is correct.

5 0
3 years ago
Read 2 more answers
On a certain​ river, a paddleboat travels 12 miles upstream ​(against the​ current) in the same amount of time it travels 20 mil
marin [14]

Given :

a paddle boat travels  upstream = 12 miles

a paddle boat travels  downstream = 20 miles

speed of the current = 2 miles per ​hour

Let the speed of the boat =x

Let the time taken = t

We know the distance for upstream D= (boat speed - current speed) * time

the distance for downstream D= (boat speed + current speed) * time

Plug in all the values and variables in the distance

For upstream 12 = (x-2)t, then t = \frac{12}{x-2}

For downstream 20 = (x+2)t then t = \frac{20}{x+2}

we got two equations for t, equate it and solve for x

\frac{12}{x-2} = \frac{20}{x+2}

Cross multiply it

12(x+2) = 20(x-2)

12x + 24 = 20x - 40 (subtract 12x  and add 40 on both sides)

64 = 8x

x= 8

the speed of the boat in still water = 8 miles per hour



3 0
3 years ago
Read 2 more answers
Find the scale factor.
aivan3 [116]

The scale factor is 1.5. The dilation rule is : (x,y)-------(.15x,1.5y)

Step-by-step explanation:

Dilation is a transformation that maps an object to an image of the same shape as the original object to form a different size image.When a larger image is produced it's called an enlargement where as when a small image is produced, it's called a reduction.

The rule of dilation, with center as the origin follows;

(x,y)------(sx,sy) where s is the scale factor. To find the scale factor, select one of the vertices of the object and of the image at divide the coordinate of image with that of object.

Taking O(2,16) and O'(3,24),  the scale factor will be;

s*2=3

2s=3

s=3/2 =1.5

or

s*16=24

16s=24

s=24/16=3/2=1.5

The scale factor is 1.5, hence the dilation rule is;

(x,y)-------(.15x,1.5y)

Learn More

Dilation:brainly.com/question/10945890

Keywords: dilation, vertices, origin, scale factor, translation

#LearnwithBrainly

5 0
4 years ago
Is this statement always true?A cross section parallel to the base of a right rectangular prism is a square
Dominik [7]

Answer:

Step-by-step explanation:

No, it's not always true

4 0
3 years ago
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