Answer: 9 packs
Step-by-step explanation:
- Mrs. Marks wants 89 pens.
- Pens come in packs of 10
89 is about 90. The pens come in packs of 10, so divide 90 by 10 and the quotient is 9.
Answer:
735 cm²
Step-by-step explanation:
The figure is a trapezium .The area of the triangle section can be calculated using the Heron's formula.
The other part of the figure will be a square of sides 21 cm by 21 cm
<u>Area of the square section</u>
Area = l²
Area = 21* 21 = 441 cm²
<u>Area of the triangle using Heron's formula</u>
Sides of the triangle are ;
a= 28 cm
c= 35 cm
b = 21 cm -----height of the trapezium
The Heron's formula is given as;
where s is half the perimeter of the triangle
Perimeter of the triangle is given as ;
P= 35 + 28 + 21 =84 cm
s= 84/2 = 42 cm
Total area = 294 + 441 = 735 cm²
Answer:
D. 3x - 3
Step-by-step explanation:
To find (f-g)(x) you have to subtract each fuction
(f-g)(x) = f(x) - g(x)
(f-g)(x) = 5x -2 - (2x+1)
(f-g)(x) = 5x -2 -2x -1
(f-g)(x) = 3x -3
Answer:
When conducting an analysis of variance analysis on a set of samples and the null hypothesis is rejected, we can test for the difference between treatment can be tested with the aid of a t-test. This is employed when 2 related groups are involved. Independent sample, paired sample or one-sample t-test can be conducted.
Step-by-step explanation:
A t-test is a test statistic used to make inferences that determine the differences that exist statistically between 2 related groups. It tells us if the 2 groups tested are from the same population. There are 3 types of t-test namely independent sample t-test, paired-sample t-test and one-sample t-test
The sign would be negative
X is in the negative area meaning that when x/y and multiplied by y, it would stay negative since y is positive
