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Sunny_sXe [5.5K]
3 years ago
15

Which expression is equivalent to 2a + 5 (2 + 7a)?

Mathematics
1 answer:
Ber [7]3 years ago
3 0

Answer:

37a + 10

Step-by-step explanation:

Have a good day :)

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At Centertown Middle School, 25% of the 124 students Mrs. Wade teaches buy their lunches in the cafeteria.
cluponka [151]

Out of 124 students, only 31 students are taught to buy their lunches in the cafeteria.

<u>Step-by-step explanation:</u>

It is given that,

The 25% of 124 students are taught to buy their lunches in cafeteria.

Therefore, the total number of students taught to buy their lunches in cafeteria is 25% of 124.

<u>To find the number of students who are capable to buy lunches in cafeteria:</u>

  • Replace the % symbol into the numeric form.
  • The % is represented by 1 ÷ 100.

The 25% of 124 students is written as,

⇒ 25×(1/100)×124

⇒ (1/4)×124

⇒ 31

The number of students taught to buy lunches in the cafeteria out of 124 students is 31 students.

5 0
4 years ago
Mr. Hurley collected baseball cards when his children were very young. Now that his children are older, he wants to give each of
mrs_skeptik [129]

Answer:

1,244

Step-by-step explanation:

3,732 cards divided among 3 children evenly equals 1,244.

3,732 / 3 = 1,244

5 0
4 years ago
The college Physical Education Department offered an Advanced First Aid course last summer. The scores on the comprehensive fina
Mekhanik [1.2K]

Answer:

a) Robert, Juan, linda

b) Joel

c) Susan, Jan

d)    165.4

       173.4

       134.5

       156

       147.3  

       170.2

       

Step-by-step explanation:

The standardized normal distribution  N (0,1)  that expresion stands for normal distribution with mean 0 and standard deviation 1, therefore all positive values are above 0 and all negativa values are below 0

The sample n is 6 then we should use t-student distribution, we calculate t statistic as follow

t = (x-μ)/εε        where standard error is   εε = σ/√6      εε = 9.795  since         σ =24

Robert

0.96 * 9.795  = x - 156                 ⇒     x = 165.4

1.78 * 9.795  = x  - 156                          x = 173.4

-2.2 * 9.795   = x - 156                          x = 134.5

0 * 9.795        = x- 156                          x= 156

-0.89* 9.795   = x -156                          x = 147.3

1.45 * 0.9795  = x -156                         x = 170.2

7 0
4 years ago
The unit rate of change of y with respect to x is the amount y changes for a change of one unit in x. Is the unit rate of change
Nataly [62]

Answer:

Option (a). The equation

Step-by-step explanation:

Rate of change of any equation or graph is represented by its slope 'm'.

In an equation y = mx + b

'm' represents the slope.

Given equation is,

y = 0.25x

Slope of the line m₁ = 0.25

From the graph attached,

A line passes through two points (0, 0) and (5, 1)

Slope of the line = \frac{y_2-y_1}{x_2-x_1}

                      m₂ = \frac{1-0}{5-0}

                      m₂ = 0.2

m₁ > m₂

Therefore, unit rate of change in y is greater in the given equation.

Option (a) will be the answer.

6 0
3 years ago
Read 2 more answers
Which property is illustrated by this example 8+0=8
AnnyKZ [126]

z = 8 + 0=8

Add: 8 + 0 = 8

8 = Yes

6 0
4 years ago
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