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andre [41]
3 years ago
13

Danielle is x years old. Her sister is 5 years older and her brother is half Danielle's age. Write an expression in simplest for

m for the sum of their ages.
Mathematics
2 answers:
NeTakaya3 years ago
6 0
The expression is 2.5x + 5
svp [43]3 years ago
4 0
It would be X=5*2 Beacuse if he is X year old and his sister is half his age which is ÷ by 2 and she is 5 than you would multiply it by two to equal 10
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(Sqrt 87)/16
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4 0
2 years ago
Joanie bought a total of 56 presents to put in 7 gift bags.She put 3 pencils and an equal number of stickers in each bag.How man
amid [387]

Answer:

5 stickers were put in each bag.

Step-by-step explanation:

There is a total of 56 presents and 7 gift bags. If she puts three pencils in each bag, 7 times 3 is 21. 56 presents minus 21 pencils is 35 presents left. 35 divided by 7 is 5, so there are 5 stickers in each bag.

7 0
3 years ago
3(x + 1) = -2 (x - 1) -4
AlekseyPX

Answer:

x = -1

Step-by-step explanation:

use distribution

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

simplify

3x + 3 = -2x - 2

combine like terms

3x + 3 = -2x - 2

-3x                -3x

3 = -5x - 2

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7 0
3 years ago
Read 2 more answers
What is the minimum amount of saran wrap that Tyler will need to cover the pencil holder, to ensure that no sand leaks out? *
liberstina [14]

Answer:

e

Step-by-step explanation:

To find the surface area of the triangular prism, you need to find the area of all the sides and add them together. The two triangular bases have already been established to have an area of 3 square units each, so together they have an area of 6 units. Two of the rectangular sides have dimensions of 3.5 by 2.5 units, while one has dimensions 3.5 by 3 units. Adding all of this together, you get a total of 34 square inches, or option e. Hope this helps!

7 0
3 years ago
Given: f(x) = 3x2 + 2x – 1
denis-greek [22]

Answer:

84

Step-by-step explanation:

f(x) = 3x^2 + 2x – 1

Let x=5

f(5) = 3(5)^2+2(5) -1

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    = 75+10 -1

    = 85 -1

4 0
3 years ago
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