MATHEMATICS HIGH SCHOOL

22. A parallelogram in which one angle 90° is necessarily:A. Square
B. rhombus C. rectangle
D.trapezium

Answers

Answer 1

Answer:

Answer:

C. Rectangle

Step-by-step explanation:

A parallelogram can not have a single 90° angle. This is because the opposite angles of a parallelogram are equal.

Therefore, the two opposite sides are equal.

In a parallelogram, neighboring angles add up to 180°. This therefore implies that all the angles are 90°.

This describes a rectangle.

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It takes Akira 10 minutes to make a black and white drawing and 25 minutes for a color drawing. On Saturday he made a total of 9 drawings in 2 hours. Write and solve a system of equations to determine how many drawings of each type Akira made.
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Which linear system has the solution (6, 6)A:4x - 3y = -1 -2x + y = -3
B: x + y = 12 3x - 2y = 6
C: 3x + y = 4 4x - 3y = 1
D: 4x + 3y = 0 2x - y = 0

Answers

B: x+y=12 3x-2y=6
6+6=12 (3×6)-(2×6)=6

By substituting x = 6 and y = 6 into the options we have that the correst answer is option B.

What is the value of s in the equation 3r=10+5s

Answers

3r=10+5s
3*10=10+5s
30=10+5s
30-10=5s
20=5s
s=4
r=10

Car rental company A charges $45 a day to rent a certain car. Car rental B charges $30 a day plus $0.20 per mile to rent a similar car. For how many miles is the cost at car rental Company B more than the cost at car rental company A?

Answers

Answer is given below

Final answer:

The cost at car rental company B is more than the cost at car rental company A when the number of miles driven is greater than $15.

Explanation:

The cost at car rental company B is more than the cost at car rental company A when the number of miles driven is greater than $15.

To find this, you can set up an equation:

The cost at car rental company A is given by: $45 x d, where d represents the number of days.
The cost at car rental company B is given by: ($30 + $0.20m) x d, where m represents the number of miles driven.

So we need to find when ($30 + $0.20m) x d is greater than $45 x d.

($30 + $0.20m) x d > $45 x d

$30 + $0.20m > $45

$0.20m > $15

m > 75

Therefore, when the number of miles driven exceeds 75, the cost at car rental company B is more expensive.

Learn more about Car rental costs here:

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If the diameter of a circle is 9 cm, then its circumference is 56.52 cm.

Answers

No. That is not true.
Dπ=circumference (approximate)
9*π(or roughly 3.14)=28.26
If the RADIUS was 9, then that would be true :D

Answer:

The answer is false

Step-by-step explanation:

What is the z score of 0.10?

Answers

Answer:

Z (0.10) = 1.282 (the Z-score which has 0.10 to the right, and 0.4000 between 0 and it). As a shorthand notation, the () are usually dropped, and the probability written as a subscript.

Step-by-step explanation:

hope this helped you if it did plz mark brainliest

The equation x^2+y2-4x+2y=b describe a circle