3 years ago

Write an expression for the sentence, 2 less than 9 times z

Mathematics

2 answers:

docker41 [41]3 years ago

6 0

Answer:

9z-2

Step-by-step explanation:

nekit [7.7K]3 years ago

3 0

9z-2

9 times z = 9z

2 less = 9z - 2

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Please help i will give brainliest to right answer (it’s multiple answers

liberstina [14]

Answer:

b c e

Step-by-step explanation:

7 0

3 years ago

In your class seven students do not receive a weekly allowance, Five students receive three dollars, Seven students receive five

olya-2409 [2.1K]

Answer:

$\large \boxed{\text{\$3.50}}$

Step-by-step explanation:

The mean is the sum of the allowances divided by the number of students.

$\text{Mean}= \dfrac{7(0) + 5(3) + 7(5) + 3(6) + 2(8)}{24}= \dfrac{0 + 15 + 35 + 18 + 16}{24} = \mathbf{3.50}\\\text{The mean weekly allowance is $\large \boxed{\textbf{\$3.50}}$}$

4 0

3 years ago

What value of c makes the polynomial below a perfect square? 4x2 + 12x + c?

Tema [17]

This is what we know:4x^2 + 12x + c = (2x + k)^2
<span> 4x^2 + 12x + c = 4x^2 + 2kx + 2kx + k^2
c=9
</span>

6 0

4 years ago

Read 2 more answers

Rick buys a spatula costing $2.23. He gives the cashier $5.00. The cashier gives him his change using the least number of coins

Virty [35]

Answer:

2 Dollar Bills

3 quarters

2 pennies

5 0

3 years ago

The sum of the squares of three consecutive positive integers is 7805. What is the sum of the cubes of the three original intege

Vitek1552 [10]

Answer:

398259

Step-by-step explanation:

Let from the given positive integers, x be the smallest integers,

Also, numbers are consecutive,

So, the second integer = x + 1,

Third integer = x + 2,

According to the question,

$x^2+(x+1)^2+(x+2)^2=7805$

$x^2+x^2+2x+1+x^2+4x+4=7805$

$3x^2+6x+5=7805$

$3x^2+6x+5-7805=0$

$3x^2+6x-7800=0$

$x^2+2x-2600$

By middle term splitting,

$x^2+(52-50)x-2600=0$

$x^2+52x-50x-2600=0$

$x(x+52)-50(x+52)=0$

$(x-50)(x+52)=0$

By zero product property,

x-50 = 0 or x + 52 =0

⇒ x = 50 or x = -52 ( not possible )

Hence, numbers are 50, 51, 52,

∵ (50)³ + (51)³ + (52)³ = 125000 + 132651 + 140608 = 398259

6 0

3 years ago