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2 years ago

I don’t understand this at all someone help me

Mathematics

1 answer:

marishachu [46]2 years ago

3 0

The answer is 2x-3, you multiply the x value by 2 and then subtract 3 which gives you your y value

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Yuliya22 [10]

i believe the formula you need is; SA= n(3/10 ib) + 9b

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3 years ago

A doctor’s office records the age at which 200 patients were treated for chicken pox. 60% of the patients were treated before ag

erik [133]

The answer is B. a=48, b=10, c=120, d=13

5 0

3 years ago

Read 2 more answers

- Factorise 121y² - m²

Otrada [13]

Answer:

$\boxed{ \bold{ { \boxed{ \sf{(11y + m)(11y - m)}}}}}$

Step-by-step explanation:

$\sf{121 {y}^{2} - {m}^{2} }$

$\longrightarrow{ \sf{ {(11y)}^{2} - {(m)}^{2} }}$

Use the formula of a² - b² = ( a + b ) ( a - b )

$\longrightarrow{ \sf{(11y + m)(11y - m)}}$

Hope I helped!

Best regards

6 0

3 years ago

A cold-water faucet can fill a sink in 1212 min, and a hot-water faucet can fill it in 1515 min. The drain can empty the sink

sweet-ann [11.9K]

Answer:

9.1 minutes.

Step-by-step explanation:

Let t represent time taken to fill the tank.

We have been given that a cold water faucet can fill a sink in 12 min, so the part of sink filed in 1 minute would be $\frac{1}{12}$ .

The hot-water faucet can fill it in 15 min, so the part of sink filed in 1 minute would be $\frac{1}{15}$ .

The drain can empty the sink in 25 min, so the part of drain emptied in 1 minute would be $\frac{1}{25}$ .

The part of 1 full tank filled in t minutes, when both faucets are on and the drain is open would be:

$(\frac{1}{12}+\frac{1}{15}-\frac{1}{25})t=1$

Make a common denominator:

$(\frac{1*25}{12*25}+\frac{1*20}{15*20}-\frac{1*12}{25*12})t=1$

$(\frac{25}{300}+\frac{20}{300}-\frac{12}{300})t=1$

$(\frac{25+20-12}{300})t=1$

$\frac{33}{300}t=1$

$\frac{11}{100}t=1$

$\frac{100}{11}\times \frac{11}{100}t=\frac{100}{11}\times1$

$t=\frac{100}{11}$

$t=9.0909$

$t\approx 9.1$

Therefore, it will take 9.1 minutes to fill the sink.

4 0

3 years ago

A rectangle is 13 yards long and 23 yards wide. What is the area of the rectangle? Enter your answer in the box as a fraction in

aalyn [17]

We know that
[<span>the area of the rectangle]=L*W
L=1/3 yd
W=2/3 yd
</span>[the area of the rectangle]=1/3*2/3---------> 2/9 yd²

the answer is 2/9 yd²

4 0

3 years ago

Read 2 more answers