MATHEMATICS MIDDLE SCHOOL

7. What is the perimeter of triangle PQR. See image below.

Answers

Answer 1

Answer:

Answer: B

Step-by-step explanation:

First find perimeter of ABC which is 21

Next multiply 21 by 0.6 to get 12.6

Answer 2

Answer:

Answer is B.12.5 feet.

hope it helps

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CALCULAR O PERÍMETRO DE UM RETANGULO, SABENDO-SE QUE SUA BASE E ALTURA DIFEREM 12 M E QUE ESTA É 1/3 DAQUELA
Simplify the following expressionx - 4y + 5z - 3x - y + 2z = ?.
A quadrilateral has angle measures of 102°, 84°, and 77°. What is the measure of the fourth angle?
What is the value of x in the equation -6x=5x+22?

Peter jogged 96 yards in 40 seconds? What is his speed in feet per second?

Answers

96 yards = 288 feet
speed is 288/40 - 7.2 feet/s

Hi, I think i got the answer wrong sorry!

Ida paid 75¢ for two iteams and got 19¢ in change. What iteams did she buy

Answers

You could buy the Magnet and the Postcard and get 19 cents!

She brought the magnets i think

Three fourths of the weight of a bunch of grapes is equivalent to three fifths of the weight of a papaya. If the grapes weigh (x+28) pounds, what is the weight of a papaya in terms of x?

Answers

Answer: p=1 1/4x+35

g=grapes
p=papaya

g=3/4(x+28)
g=3/4x+21

g=3/5p
substitute g for '3/4x+21'.
3/4x+21=3/5p
divide both sides by 3/5
1 1/4x+35=p

So..

p=1 1/4x+35

Write a expression that is equivalent to 4(x+3)-2

Answers

4(x+3)-2 = 4x+12-2 then 4x+10

A regular octagon has sides measuring about 4cm. If the octagon is divided into 8 congruent triangles, each has a height of 5 cm. What is the area of the octagon?

Answers

Base of each triangle = about 4 cm
Height of each triangle = 5 cm

Area of each triangle = (1/2) (base) (height)
and there are 8 of them.

Total area = (8) x (1/2) x (base) x (height) =

(4) x (about 4 cm) x (5 cm) = about 80 cm² .

The area of a triangle is 1/2*base*height

So, do that for one of the triangles, since they're all the same 1/2*4*5=10cm squared

Multiply by 8 to find the total

10*8=80

80 cm squared.

If 9(x − 9) = −11, then x = ?A. -92/9
B. -20/9
C. -11/9
D. -2/9
E. 70/9

Answers

$9(x - 9) =-11\n \n9x-9\cdot 9=-11\n \n9x-81=-11 \ \ |+81\n \n9x-81+81=-11+81\n \n9x=70 \ \ /:9\n \nx=(70)/(9)\n \nAnswer : \ E. \ \ 70/9$

$9(x - 9) = -11\n 9x-81=-11\n 9x=70\n x=(70)/(9)$

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