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3 years ago

Explain your answer !! Have a nice day Will give braisnlt

Mathematics

2 answers:

yan [13]3 years ago

8 0

Answer: x=3, y=4

Step-by-step explanation:

We are going to use the elimination method to solve this since the x values have inverse of each other. We are going to add the 2nd equation to the 1st and we will get: y=-4 then plug y=-4 into one of the equations, then solve for x. 4(x)+5(-4)=-8, 4x-20=-8, 4x=12, x=3. So x=3, y=4

nikdorinn [45]3 years ago

3 0

Answer: x=3, y=-4

Step-by-step explanation:

First, get either the x or the y variable by itself using one of the given equations:

-4x-4y=4

-4y=4+4x

y=-(4+4x)/4

y=-1-x

Then plug this into all the y variable in the other equation to find x:

4x+5(-1-x)=-8

4x-5-5x=-8

-1x-5=-8

-x=-3

x=3

Then plug this into ever x of one of the equations to find y:

4(3)+5y=-8

12+5y=-8

5y=-20

y=-4

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Talia wants to write the equation of the graphed line in point-slope form. These are the steps she plans to use: Step 1: Choose

TEA [102]

Answer:
Steps 3 and 4 are incorrect because
(a) An incorrect value for slope was obtained in step 3.
(b) The incorrect value for the slope was used in step 4.

Explanation:
Let us evaluate Talia's steps.

Step 1: Select (2, 5) as a point on the line.
CORRECT

Step 2: Select another point (1, 3) on the line.
CORRECT

Step 3: Count units to the right and count units up, to determine the slope.
Units right = 2 - 1 = 1
Units up = 5 - 3 = 2
Slope = (Units up)/(Units right) = 2/1 = 2
INCORRECT because Talia did not obtain a slope of 2.

Step 4: Substitute obtained values in the point-slope form.
(y - y1) = m(x - x1). If we select the point (1, 3), then
y - 2 = 2(x - 1).
Talia's equation is INCORRECT because she used an incorrect value
for the slope.

8 0

3 years ago

Read 2 more answers

Please check my answer. I got d =11. Find the length of the line segment whose endpoints are (- 5, 6) and (6, 6).

blondinia [14]

Yes,

It is correct.

I am sure of it..
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~MisterMistyEyed

8 0

4 years ago

Simplify (x^3/8)^3/4

Viktor [21]

When an exponent is raised to another exponent, you can multiply the powers to simplify them.

3/8*3/4

*Multiply numerators*

3*3=9

*Multiply denominators*

8*4=32

x^9/32

Hope this helps!!

4 0

3 years ago

Read 2 more answers

DO NOT SKIP LETS SO WHOS SMART ENOUGH TO ANSWER THESE 2 PROBLEMS I CHALLENGE YOU!!

rodikova [14]

Q 16. The energy is 308.7 J.

Q 17. The energy is 896000 J.

Step-by-step explanation:

Q 16. Given,

Mass (m) of the carriage and baby = 1.5 kg

Height (h) = 21 m

To find the energy.

We will find the potential energy as it rests at the top.

Formula

Potential energy = mgh where g be the gravitational force of the earth = 9.8m/s²

So,

Energy = 1.5×9.8×21 J

= 308.7 J.

Hence,

The energy is 308.7 J.

Q 17. Given,

Mass (m) = 1120 kg

Speed (v) = 40 m/s

To find out the energy.

We will find out the kinetic energy as the car is in motion.

Formula

Kinetic energy = $\frac{1}{2}$ mv²

So,

Energy = $\frac{1}{2}$ ×1120×40² J

= 896000 J

Hence,

The energy is 896000 J.

7 0

4 years ago

Write an expression that represents "the sum of x and 8". x - 8 8x x + 8

Alexxx [7]

Answer:

The expression that represents "the sum of x and 8" is x + 8

Solution:

Given, a sentence “the sum of x and 8”

Now, we have to write an expression that represents the above given line and check the correct option.

So, now, let us take the given expression and convert it into the polynomial form.

Take, “the sum of x and 8" → sum of x and 8 → x + 8.

Here "+" denotes sum or addition.

Hence, expression for “the sum of x and 8” is x + 8 and option c is correct.

7 0

3 years ago