All categories

3 years ago

HELP FAST PLEASE HURRY I NEED IT TO BE RIGHT

Mathematics

1 answer:

drek231 [11]3 years ago

5 0

Answer:

{x + 4y = 8

{5x + 5y = 10

Step-by-step explanation:

Just add everything like it said, and you will arrive at your answer.

I am joyous to assist you anytime.

You might be interested in

Whats the area of a circle with a diameter of 12 cm?

Vedmedyk [2.9K]

Answer:

113.1cm

Step-by-step explanation:

area= $\pi$ r²

r= half the diameter r=6

a= $\pi$ 6²

a= $\pi$ 36

a=113.1 cm

8 0

3 years ago

A software developer wants to know how many new computer games people buy each year. Assume a previous study found the standard

Marrrta [24]

Answer:

The minimum sample size required to ensure that the estimate has an error of at most 0.14 at the 95% level of confidence is n=567.

Step-by-step explanation:

We have to calculate the minimum sample size n needed to have a margin of error below 0.14.

The critical value of z for a 95% confidence interval is z=1.96.

To do that, we use the margin of error formula in function of n:

$MOE=\dfrac{z\cdot \sigma}{\sqrt{n}}\\\\\\n=\left(\dfrac{z\cdot \sigma}{MOE}\right)^2=\left(\dfrac{1.96\cdot 1.7}{0.14}\right)^2=(23.8)^2=566.42\approx 567$

The minimum sample size to have this margin of error is n = 567.

3 0

2 years ago

The equation models the (h) height in centimeters after (t) seconds of a weight ttached to the end of a spring that has been str

Elena L [17]

Answer:

t = 3 arc cos(h/7)/π

Step-by-step explanation:

The equation h=7cos(pi/3 t) models the (h) height in centimeters after (t) seconds of a weight attached to the end of a spring that has been stretched and released. To solve the equation for t we will solve the equation step by step:

h=7cos(pi/3 t)

Step 1)

Divide both sides by 7

h/7 = 7cos(pi/3 t)/7

Now the equation becomes h/7=cos(pi/3 t)

Step 2)

h/7=cos(pi/3 t)

Now apply inverse cosine function:

arc cos (h/7) = pi/3 t

Step 3)

t = 3 arc cos(h/7)/pi

Thus t = 3 arc cos(h/7)/pi ....

6 0

2 years ago

Simplify by combining like terms: 15x +2 - 7 - 5x

Step2247 [10]

Answer:

10x-5

Step-by-step explanation:

You subtract 15x-5=10x. Then you do -7+2. The 7 is negative . So it would be -7 plus two. So it would equal -5. So it's 10x-5

5 0

2 years ago

Find the missing geometric means in this sequence.

amid [387]

What's the problem?

3 0

2 years ago