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Ad libitum [116K]
3 years ago
14

The outside temperature at midnight us -7° C . By 11 am the temperature has risen by 12°C what is the temperature at 11 am

Mathematics
1 answer:
Yanka [14]3 years ago
3 0

Answer:

5°C

Step-by-step explanation:

We need to add 12 onto the -7:

-7 + 12 = 5

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The length of the hall way

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umka21 [38]

Answer:

22 units

Step-by-step explanation:

Add 12, 4 , and 6 and you will get 22

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3 years ago
3x-4 or = to 7<br><br><br> plz help
lisabon 2012 [21]

Answer:

3 + 4 = 7  which is true.

Step-by-step explanation:

Whenever you have an equation with a plain variable (that is, no exponent included), there is only one number that will work when substituted for x.

To solve it, you have to "undo" what is done to the variable. You also go in the reverse order of operations, so you do the addition/subtract first, then multiplication/division.

You also have to do the same to both sides, kind of like keeping a balance scale in balance.

In this case, we subtract 4 from both sides first:

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The + 4 - 4 cancel each other out, so you get:

3x = 3

3x means "3 times x" so you divide by 3 to undo it. I will use the / to indicate division:

3x / 3 = 3 /3  

so 1x = 1.

Since 1x is "1 times x" it is the same as x by itself, so:

x=1

AND, if we substitute 1 back into the original equation (the asterisk stands for multiply):

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3 * 1 is 3, so:

3 + 4 = 7     which is true.

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3 0
3 years ago
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Isla pick tomatoes from her vegetable patch and then sells them in boxes she changes 14p for each tomatoes and 25p for each boxe
amid [387]

9514 1404 393

Answer:

  • 18 tomatoes: £3.02
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Step-by-step explanation:

a) at 12 tomatoes per box, 18 tomatoes will require 2 boxes. Then Isla's price will be ...

  2(25p) +18(14p) = 50p +252p = £3.02

18 tomatoes in 2 boxes cost £3.02.

__

b) The 3 boxes cost 3(25p) = £0.75, so the tomatoes cost ...

  £4.39 -0.75 = £3.64

at 14p each, the number of tomatoes is £3.64/£0.14 = 26

There are 26 tomatoes in 3 boxes costing £4.39.

7 0
3 years ago
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