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2 years ago

10

How do I work out this

1 answer:

Ivenika [448]2 years ago

7 0

Answer & Step-by-step explanation:

1.5 litres = 1500ml

<u>Small Milk Carton</u>

300ml x 5 = 1500ml

£1.20 x 5 = £6

<u>Large Milk Carton</u>

500ml x 3 = 1500ml

£1.40 x 3 = £4.20

The best value for 1.5l (1500ml) is to purchase 3 large milk cartons, as it's cheaper (by £1.80) than buying a small milk cartons.

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Solve: negative 1 over 2 x + 1 = −x + 8 (5 points)

Naya [18.7K]

It is 14 because if you have -1/2x + 1 = -x + 8 you would combine the multiplied terms into a single fraction then subtract the one from both sides simplify till you get -x/2 = -x + 7 then you will add like terms so the x’s then you multiply all terms by two like 2(-x/2)= 2•7 then you can get 14.
(Sorry if you didn’t need the whole explanation)

5 0

3 years ago

A train travels from station A to C having distance of 285 miles in 6 hours. During the journey, it reaches intermediate station

Nesterboy [21]

Answer:

Distance between B and C = $3\times 55=165miles$

Step-by-step explanation:

Let the time taken to reach from station A to B be x hr

Let the time taken to reach from station B to C be y hr

Given total time from station A to C be 6 hr

∴ x + y = 6

⇒ y = 6 - x → (1)

Also total distance given is 285 miles

As $Distance=Speed\times Time$

∴ distance travelled between station A and B

= $40\times xmiles$

distance travelled between station B and station C

= $55\times ymiles$

So, 40x + 55y = 285

⇒ 40x + 55(6 -x) = 285 (From 1)

=> 40x + 330 - 55x = 285

=> -15x = 285 - 330

=> -15x = -45 ⇒ x=3

gives y = 6-3 = 3 hours

Distance between B and C = $3\times 55=165miles$

5 0

3 years ago

there are 9 students in a class: 7 boys and 2 girls. if the teacher picks a group of 3. at random, what is the probability. that

timurjin [86]

There is a 1 out of 3 chance of a full boy group

6 0

4 years ago

Read 2 more answers

Solve for x....<br> -4+13x=12x+4

Sav [38]

You put all x on left side and numercial on the right side

13x-12x = 4+4

x = 8

5 0

3 years ago

Read 2 more answers

In a circuit, two resistors of 100 Ω and 80 Ω are connected in parallel. The parallel group is then connected in series with a 1

nordsb [41]

Answer:

Total Resistance = $\frac{1300}{9}$ Ω (or 144.44 Ω)

Step-by-step explanation:

If two resistors, with resistance x and y, are connected in parallel, their total resistance is given by the formula:

$\frac{1}{Total}=\frac{1}{x}+\frac{1}{y}$

If 2 resistors with resistance x and y and connected in series, their total resistance would be:

Total = x + y

<em>Now, the first part, 100 and 80 are in parallel, so according to formula it would be:</em>

<em> $\frac{1}{Total}=\frac{1}{x}+\frac{1}{y}\\\frac{1}{Total}=\frac{1}{100}+\frac{1}{80}\\\frac{1}{Total}=\frac{9}{400}\\Total = \frac{400}{9}$ </em>

<em />

<em>Now, this is connected in series with 100, so the grand total would be:</em>

<em>Total Resistance of Circuit = $\frac{400}{9}+100=\frac{1300}{9}$ </em>

<em />

This is the total resistance of the circuit.

4 0

3 years ago