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4 years ago

Which expression can be used to model the phrase “ the sum of three and a number”?

Mathematics

2 answers:

olga nikolaevna [1]4 years ago

5 0

Answer:

x + 3

Step-by-step explanation:

A 'sum' means addition, 'a number' is represented by a variable, in this case, I chose 'x'. I could have picked any variable I wanted.

The sum of three and a number means: three plus some number, which is

3 + x in math language. We write variables before constants, so it gets

rewritten as x + 3

Oliga [24]4 years ago

5 0

Answer:

A) 3 + x

Step-by-step explanation:

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Determine whether the forces in the pair are pulling at right angles to each other.

prohojiy [21]

Answer:

C) 3.0

Step-by-step explanation:

Let the length of the other side be x.

Using Pythagoras theorem for right-angled triangle,

4.2^2=2.9^2+x^2

or,x^2=4.2^2-2.9^2

or,x^2=9.23

or,x=√9.23=3.0 units

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4 years ago

(9x-9)(9×+9), your finding the difference between two squares. im have some trouble in how to solve it.

sergejj [24]

Answer: Your answer is 0 (F.O.I.L) first. outer. inner. last. Or you could use what my teacher calls the magic box

Step-by-step explanation:

So for the boxes you multiply for example the top left box you multiply the 9 above it and the 9 to the left or like the top right box you multiply the -9 above it and the 9 on the outside of the box to the left

8 0

3 years ago

Which pair of triangles attempts to use SSA Congruence Postulate to prove the triangles congruent?

Aleks [24]

Answer:

the third boxes

Step-by-step explanation:

SSA is saying Side Side angle and that is the only one that follows that rule

6 0

3 years ago

Read 2 more answers

What is the distance between the longest dog in the shortest dog Short 7 over 8 longest 3 over 8 what is the difference

Step2247 [10]

Answer:

The distance between the longest dog and the shortest dog is 4 over 8 ( $\frac{4}{8}$ ) OR 1 over 2 ( $\frac{1}{2}$ )

Step-by-step explanation:

From the question,

Short is 7 over 8, that is,

Short = $\frac{7}{8}$

and longest is 3 over 8, that is

Longest = $\frac{3}{8}$

The distance between the longest dog and the shortest dog can be determined by finding the difference between the fractions. That is,

$\frac{7}{8} - \frac{3}{8} = \frac{7 - 3}{8}$

$= \frac{4}{8}$

$= \frac{1}{2}$

Hence, the distance between the longest dog and the shortest dog is 4 over 8 ( $\frac{4}{8}$ ) OR 1 over 2 ( $\frac{1}{2}$ ).

7 0

3 years ago

Factorise : x³ + x - 3x² -3

ANEK [815]

Answer:

(x²+1)(x-3)

Step-by-step explanation:

Factorize x³ + x - 3x² -3

x³-3x²+x-3

Factorize

x²(x-3)+1(x-3)

= (x²+1)(x-3)

Hence the factorized form is (x²+1)(x-3)

6 0

3 years ago