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3 years ago

A student is trying to solve the system of two equations given below:

Mathematics

1 answer:

Mariana [72]3 years ago

5 0

Answer:

A)−3(y + z = 4)

Step-by-step explanation:

Equation P: y + z = 4

Equation Q: 3y + 7z = 15

To eliminate the y term, The equations have to have the coefficients on y equal and opposite.

Equation Q has 3y, so Equation P needs -3y

Multiply equation P by -3

−3(y + z = 4)

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Please help with this

Sergeeva-Olga [200]

Answer:

33.3 pounds

Step-by-step explanation:

Alright, so if she made a 100 percent on the gloves, then she sold them for 8 dollars, because 4 + 1.00(4) = 8.

48 - 8 = 40

She sold the skirt for 40 dollars, and if that's at a 20 percent profit, then we can do a proportion

$\frac{40}{1.20} = \frac{x}{1.00}$

If we solve for x, we figure out that x = 33.33333 repeating.

So out answer to the nearest decimal place is 33.3 pounds

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4 years ago

PLEASEE HELP.!! ILL GIVE BRAINLIEST.!! *EXTRA POINTS* DONT SKIP:((

statuscvo [17]

Answer:

2/1 or 2

Step-by-step explanation:

m(slope)= y2-y1/ x2-x1

i hope this helps

3 0

3 years ago

I. Elena wants to estimate what proportion of computers produced at a factory have a certain defect. A random sample of 200 comp

nadya68 [22]

The answer is (A) 0.4529, 0.5871

8 0

2 years ago

A blueberry pie is shot out of a pie cannon from a height of 6m and with a velocity of 60 m/s. How many seconds will pass before

sveta [45]

Answer: 1.106 s

Step-by-step explanation:

This situation is related to projectile motion and one the equation that models the height of the blueberry pie in time is:

$y=y_{o}+V_{o}sin(\theta) t-\frac{1}{2}gt^{2}$

Where:

$y=0 m$ is the blueberry pie final height (when it hits the ground)

$y_{o}=6 m$ is the blueberry pie initial height

$V_{o}=60 m/s$ is the blueberry pie initial velocity

$\theta=0 \°$ is the angle, assuming the pie was shot horizontally

$t$ is the time

$g=9.8 m/s^{2}$ is the acceleration due gravity

Rewriting the equation:

$0=y_{o}-\frac{1}{2}gt^{2}$

Isolating $t$ :

$t=\sqrt{\frac{2y_{o}}{g}}$

$t=\sqrt{\frac{2(6 m)}{9.8 m/s^{2}}}$

Finally:

$t=1.106 s$

5 0

3 years ago

If 4 bunnies can eat all the crops in a garden in 10 hours, how long will it take 5 bunnies to eat the same crops?

worty [1.4K]

Answer:

12.5 hours

Step-by-step explanation:

10 / 4 = 2.5

2.5 * 5 = 12.5

7 0

3 years ago

Read 2 more answers