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3 years ago

Ben saved twenty four 10p coins and ten 20p coins How much has he saved?

Mathematics

1 answer:

Yakvenalex [24]3 years ago

6 0

The answer is 440.
24 * 10 = 240
10 * 20 = 200
240 +200 = 440

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Y=-3x + 4 y= 3x - 2 Solve using Elimination Method

vova2212 [387]

Answer:

x=1

y=1

Step-by-step explanation:

-3x+4=3x-2

-3x+3x+4=3x+3x-2

4=6x-2

4+2=6x-2+2

6=6x

x=1

y=3(1)-2

y=1

3 0

3 years ago

A coffee supply store waits until the orders for its special coffee blend reach 100 pounds before making up a batch. Coffee sell

Daniel [21]

Let x represent the number of pounds of $10.75/lb coffee used in the mix.
.. 10.75x +3.25(100 -x) = 5.65*100 . . . . . . total cost of coffee blend
.. x(10.75 -3.25) = 100*(5.65 -3.25) . . . . . .separate x-terms from non-x terms
.. x = 240/7.5 = 32

32 pounds of $10.75/lb coffee should be used
68 pounds of $3.25/lb coffee should be used

7 0

2 years ago

What is the least common multiple of 14 and 42 ( PLEASE HELP EXTRA POINTS !! )

zaharov [31]

Answer:

Prime factors of 14(2,7)

Prime factors of 42(2,3,7)

List all the prime factors that appear in either number, then multiply

2*7=14 LCM

Step-by-step explanation:

3 0

3 years ago

Leah cut a 7 inch piece of ribbon into pieces that are each 1/2 an inch long.How many pieces of ribbon did she cut?

Sophie [7]

The answer is c) 14 hope this helps

3 0

3 years ago

Read 2 more answers

Which shows the expression below in simplified form? (7 × 10-3) - (2.3 × 10-6) A. 6.9977 × 10-3 B. 6.99977 × 10-3 C. 6.9977 × 10

rosijanka [135]

Option A

$(7 \times 10^{-3}) - (2.3 \times 10^{-6}) = 6.9977 \times 10^{-3}$

Solution:

Given expression is:

$(7 \times 10^{-3}) - (2.3 \times 10^{-6})$

To evaluate the expression, let us make the exponent of 10 same

$2.3 \times 10^{-6} = 0.0023 \times 10^{-6+3} = 0.0023 \times 10^{-3}$

[ Here, decimal point is moved three times left, so add 3 ]

Therefore,

$(7 \times 10^{-3}) - (2.3 \times 10^{-6}) = (7 \times 10^{-3}) - (0.0023 \times 10^{-3})$

$\text{Take the } 10^{-3} \text{ as common }$

$(7 \times 10^{-3}) - (0.0023 \times 10^{-3}) = 10^{-3}(7-0.0023)\\\\\text{ Solve for terms inside the bracket }\\\\(7 \times 10^{-3}) - (0.0023 \times 10^{-3}) = 10^{-3} \times 6.9977\\\\\text{Therefore, the simplified expression is: }\\\\(7 \times 10^{-3}) - (0.0023 \times 10^{-3}) = 6.9977 \times 10^{-3}$

Thus Option A is correct

6 0

3 years ago