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4 years ago

Evaluate ab-0.5bab-0.5ba minus 0 point 5,b when a=1a=1a equals 1 and b=5b=5

Mathematics

2 answers:

schepotkina [342]4 years ago

8 0

Answer:

$2.5$

Step-by-step explanation:

We want to evaluate $ab-0.5b$ when a=1 and b=5.

We just have to substitute the value of a and b into the given expression and simplify.

$(1)(5)-0.5(5)$

This simplifies to:

$5-2.5$

This will finally give us;

$2.5$

Alex17521 [72]4 years ago

8 0

Answer is 2.5

Step-by-step explanation:

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At a fair cake-eating contest, Bobby ate three cakes in 20 minutes. At the same speed, how long did it take to win the contest b

Alina [70]

Answer:

140 minutes

Step-by-step explanation:

First divide 21 by 3 to get 7

Then do 20*7 to get 140 :)

4 0

3 years ago

Read 2 more answers

(7-3)x(9-2)= what I am stuck help me

natka813 [3]

7-3=4
9-2=7
4x7=28
Use PEMDAS for order of operations, it will save your life
Parenthesis Exponents Multiply Divide Add Subtract
Multiply and Divide and Add and Subtract can be switched around with each other, but multiply and divide always happens before add and subtract. The reason you add first here is because it is in the parenthesis.

3 0

4 years ago

A drama teacher has a budget of $120 to spend on materials to create costumes for a play. She can buy 1 square yard of white mat

Neporo4naja [7]

Inequalities are used to relate unequal expressions

The greatest whole number of square yards the teacher can buy is 4

The inequality is given as:

$8x + 10y \le 120$

When the <em>number of square yards </em>of the white fabrics is 10.

It means that: x = 10

So, we have:

$8 \times 10 + 10y \le 120$

$80 + 10y \le 120$

Collect like terms

$10y \le 120 - 80$

$10y \le 40$

Divide both sides by 10

$y \le 4$

The above inequality means that:

The greatest whole number of square yards the teacher can buy is 4

Read more about inequalities at:

brainly.com/question/15137133

4 0

3 years ago

Find the percent of area under a normal curve between the mean and the given number of standard deviations from the mean. (Note

coldgirl [10]

Answer:

15.86%

Step-by-step explanation:

When the distribution is normal, we use the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

Percent of area between the mean and 0.20 standard deviations from the mean:

pvalue of Z = 0.2 subtracted by the pvalue of Z = -0.2

Z = 0.2 has a pvalue of 0.5793

Z = -0.2 has a pvalue of 0.4207

0.5793 - 0.4207 = 0.1586

So this percentage is 15.86%

8 0

4 years ago

What is the length of segment AB? (1 point) Coordinate grid shown from negative 8 to positive 8 on both x axis and y axis at int

Marina CMI [18]

Answer:

<h2>The distance between points A and B is 8.5 units, approximately.</h2>

Step-by-step explanation:

In the image attached you can observe a representation of the problem.

We have to find the distance between points A and B, which have coordinates (6,0) and (0,6), respectively.

The definition of distance between to given points is

$d=\sqrt{(y_{2} -y_{1} )^{2} +(x_{2} -x_{1})^{2} }$

Using points A and B, the distance between is

$d_{AB}=\sqrt{(6-0)^{2} +(0-6)^{2} } =\sqrt{36+36}=\sqrt{72} \\ d_{AB} \approx 8.5$

Therefore, the distance between points A and B is 8.5 units, approximately.

8 0

4 years ago