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I am Lyosha [343]
3 years ago
14

Evaluating expression

Mathematics
1 answer:
galben [10]3 years ago
5 0
(I'm going to show you the first problem)

25 - (3.1 x 6 +5.3)

Calculate everything in the parentheses first: 

- 3.1 x 6 = 18.6

- 18.6 + 5.3 = 23.9

So now you only have two numbers

- 25 - 23.9 = 1.1

The answer is 1.1

Let me know if you need help with anything else!
You might be interested in
Dvide £117 in the ratio 5:4
kupik [55]

Answer:

65:52

Step-by-step explanation:

5 + 4=9

117/9=13

13*5=65

13*4=52

to make sure the answer is right 65+52=117

so the answer is 65:52

3 0
3 years ago
Brian invests £600 into his bank account.
Savatey [412]

Answer:

It will be £2520

Step-by-step explanation:

  1. 3.2=
  2. \frac{16}{5}
  3. \frac{16}{5}  \times 100 = 320
  4. 320
  5. 320 \times 6 = 1920
  6. 1920 + 600 = 2520
7 0
3 years ago
Write an equation in slope intercept form for the graph (-3,3) (3,-1)
Nookie1986 [14]

Answer:

y = (-3/2)x + 7/2

Step-by-step explanation:

Find the slope of this line first.

As you move from the first point to the second, x (the 'run') increases by 6 and y (the 'rise') decreases by 4 (from 3 to -1).  Thus the slope is

m = rise/run = -6/4 or -3/2.

Find b for this situation, using y = mx + b, m = -3/2, y = -1 and x = 3:

-1 = (-3/2)(3) + b.  Multiply all three terms by 2:

2(-1) = -9 + 2b, or 7 = 2b.  Then b = 7/2, and the desired equation is

y = (-3/2)x + 7/2

6 0
3 years ago
Problem of the Day:
Shtirlitz [24]

Answer:

Step-by-step explanation:

What this question is asking of you is what is the greatest common divisor of 12 and 15. Or, what is the biggest number that divides both 12 and 15.

in order to find this we have to split each number into it's prime components.

for 12 they are 2,2 and 3 (

2

⋅

2

⋅

3

=

12

)

and for 15 they are 3 and 5 (

3

⋅

5

=

15

)

Out of those two groups (2,2,3) and (3,5) the only thing in common is 3, so 3 is the greatest common divisor. That tells us that the greatest number of groups that can exist and have the same number of girls and the same number of boys for each group is 3.

Now to find out how many girls and boys there are going to be in each group we divide the totals by 3, so:

12

3

=

4

girls per group, and

15

3

=

5

boys per group.

(just as a thought exercise, if there were 16 boys, the divisors would have been (2,2,3) and (2,2,2,2), leaving us with 4 groups [

2

⋅

2

] of 3 girls [12/4] and 4 boys [16/4] )

8 0
3 years ago
Price-club sells a 12-ounce box of crackers for $2.59 and Shop Mart sells 1-pound box of crackers for $4.68. The unit price at P
Vesna [10]

Answer:

The unit price at Price-Club is $0.2158 per ounce.

The unit price at Shop Mart is $0.2925 per ounce.

Step-by-step explanation:

Price Club:

12-ounce box of crackers for $2.59

So

12 ounces - $2.59

1 ounce - x

12x = 2.59

x = \frac{2.59}{12}

x = 0.2158

The unit price at Price-Club is $0.2158 per ounce.

Shop Mart:

1-pound box of crackers for $4.68.

1 pound is 16 ounces. So

16 ounces - $4.68

1 ounce - x

16x = 4.68

x = \frac{4.68}{16}

x = 0.2925

The unit price at Shop Mart is $0.2925 per ounce.

8 0
3 years ago
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