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2 years ago

Solve the following system of equations. y = 2x + 1 y = x2 – 5x + 7

Mathematics

1 answer:

BlackZzzverrR [31]2 years ago

5 0

The answer is x = 2 and y = 3

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Priya drew a circle whose area is 25 cm. Dan drew a circle whose diameter is 4 times the radius of Priya's circle. How many time

Vitek1552 [10]

Answer:

400

Step-by-step explanation:

first work out the radius of priya's circle with the equation a = $\pi r^{2}$

$25 = \pi r^{2}$

$\frac{25}{\pi } = r^{2}$

$r = \sqrt{\frac{25}{\pi } }$

we know the diameter of a circle is 2 times the radius so the diameter of priya's circle is 2x $\sqrt{\frac{25}{\pi } }$

this means that if the diameter of dan's circle is 4 times bigger it must be

8x $\sqrt{\frac{25}{\pi } }$

to find the radius of dan's circle we divide the diameter by to 2 to give

4x $\sqrt{\frac{25}{\pi } }$

then use the a= $\pi r^{2}$ equation again

$a= (4 \sqrt{\frac{25}{\pi } })^{2} \pi$

which equals 400

hope that helped

6 0

3 years ago

Explain how you would round the numbers 33 and 89 to estmate their sum

ValentinkaMS [17]

Well 33 is rounded down to 30

And 89 is rounded up to 90

So it would be 120

Anything from 1-4 is rounded down and anything 5-9 is rounded up

8 0

3 years ago

Read 2 more answers

$570, 2%, 6 months - Help, I don’t get how to do it.

Phantasy [73]

Answer:

$641.91

Step-by-step explanation:

A(t) = 570(1+0.02)^6

8 0

3 years ago

Angelo has a credit score of 726. According to the following

Vaselesa [24]

Answer:

Good ( 660- 749)

Step-by-step explanation:

Because of this fact:

726 > 660 and 726 < 749

So his credit rating is considered as Good ( 660- 749)

Have a good day

8 0

3 years ago

Read 2 more answers

PLEASE HELP ASAP!!! CORRECT ANSWERS ONLY PLEASE!! Subract and simplify.

pantera1 [17]

Answer: C

Step-by-step explanation:

$\dfrac{x+1}{x-5} - \dfrac{x-2}{x+3}$

= $\dfrac{x+1}{x-5}(\dfrac{x+3}{x+3}) - \dfrac{x-2}{x+3}(\dfrac{x-5}{x-5})$

= $\dfrac{x^{2}+4x+3}{(x-5)(x+3)} - \dfrac{x^{2}-7x+10}{(x-5)(x+3)}$

= $\dfrac{x^{2}+4x+3-(x^{2}-7x+10)}{(x-5)(x+3)}$

= $\dfrac{11x-7}{(x-5)(x+3)}$

5 0

3 years ago