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Sophie [7]
3 years ago
14

How to write 'the sum of z and 7' in an algebric expression?

Mathematics
2 answers:
Evgesh-ka [11]3 years ago
7 0
Sum means to add
z+ 7
KonstantinChe [14]3 years ago
7 0
Z+7= or 7+z= and you would sub in a number for z to find a sum
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What is (x+6)^2 and (x-3)^2
Snezhnost [94]
(x + 6)²                    (x - 3)²
(x + 6)(x + 6)           (x - 3)(x - 3)
x² + 6x + 6x + 36    x² - 3x - 3x + 9
x² + 12x + 36          x² - 6x + 9


4 0
3 years ago
The length of a rectangle is five less than its width. The area of the rectangle is 84 square feet. Write a quadratic equation i
salantis [7]

<u>Given</u>:

The length of a rectangle is 5 less than its width.

The area of the rectangle is 84 square feet.

We need to determine the quadratic equation in standard form that represents the area of the rectangle.

<u>Dimensions of the rectangle:</u>

Let l denote the length of the rectangle.

Let w denote the width of the rectangle.

Since, it is given that the length is 5 less than its width, it can be written as,

l=5-w and w=w

<u>Area of the rectangle:</u>

The area of the rectangle can be determined using the formula,

A=length \times width

Substituting A = 84, l=5-w and w=w, we get

84=(5-w)\times w

84=5w-w^2

Adding both sides of the equation by w², we have;

w^2+84=5w

Subtracting by 5w on both sides, we get;

w^2-5w+84=0

Thus, the quadratic equation in standard form for the area of the rectangle is w^2-5w+84=0

4 0
3 years ago
I don’t really get number 4
Oduvanchick [21]

Answer:

C

Step-by-step explanation:

Since the 7 swim teachers had about the same amount of students, you can divide 137 by 7, which comes out to about 20.

7 0
3 years ago
Read 2 more answers
Find the area of the figure
sveticcg [70]

Answer:

What figure?

Step-by-step explanation:

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3 years ago
Jill is considering a 7/23 balloon mortgage with an interest rate of 3.5% to
abruzzese [7]

Answer: A. $1189.97

Step-by-step explanation:

8 0
3 years ago
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