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3 years ago

Solve it! Hurry Will mark as brainliest IF U TRY TO get the points free i would report u

Mathematics

2 answers:

Afina-wow [57]3 years ago

8 0

Answer:

A. 3x^2+7x^2+2×3x ×7-84x = 3x^2+7x^2-2×3x×7

9x^2+49x^2+42x-84 x= 9x^2+49x^2-42x

9x^2+49x^2-42 = 9x^2+49 x^2-42x

verified

ad-work [718]3 years ago

7 0

Answer:

Give him or her brainlist

Step-by-step explanation:

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Ms. Yazzie earns $16.40 per hour at her job. She works 372 hours a week for 50 weeks a year

IceJOKER [234]

Answer:

Hi how are you doing today Jasmine

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3 years ago

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Daniel [21]

O baby, this is gonna be kinda hard

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4 years ago

Read 2 more answers

Draw a square and its diagonals. Guess the measures of these angles.

ruslelena [56]

Answer:

90 degrees on each angle.

Step-by-step explanation:

A square is symmetrical on all sides, so each side has to be a right angle. Each right angle adds up to 360 degrees, the total degrees of a quadrilateral.

4 0

3 years ago

Find the lengths of the sides of the triangle PQR. Is it a right triangle? Is it an isoseceles triangle?(a)P(3,−2,−3),Q(7,0,1),R

lawyer [7]

Answer:

(a) It is an isosceles triangle with sides of lengths: 6, 2√10, and 6 units.

(b) It is a right-angled triangle with hypotenuse side of 3√5 units, and opposite and adjacent sides of 6 and 3 units

Step-by-step explanation:

(a) P(3,−2,−3), Q(7,0,1), R(1,2,1)

|PQ| = √[(7-3)² + (0+2)² + (1+3)²]

= √(4² + 2² + 4²)

= √36

= 6

|QR| = √[(1-7)² + (2-0)² + (1-1)²]

= √((-6)² + 2² + 0)

= √40

= 2√10

|RP| = √[(3-1)² (-2-2)² (-3-1)²]

= √[(2² + (-4)² + (-4)²]

= √36

= 6

|PQ| = |RP|

So, triangle is isosceles.

(b) P(2,−1,0), Q(4,1,1), R(4,−5,4)

|PQ| = √[(4-2)² + (1+1)² + (1-0)²]

= √(2² + 2² + 1²)

= √9

= 3

|QR| = √[(4-4)² (-5-1)² (4-1)²]

= √[(0 + (-6)² + 3²]

= √45

= 3√5

|RP| = √[(2-4)² + (-1+5)² + (0-4)²]

= √((-2)² + 4² + (-4)²)

= √36

= 6

|PQ|² + |RP|² = |QR|²

So, triangle is right-angled

8 0

4 years ago

You are remodeling your kitchen. You’ve contacted two tiling companies who gladly told you how long it took their workers to til

Anvisha [2.4K]

Answer: Jim can lay 25 tiles per hour.

Step-by-step explanation:

Let be "x" Jim's rate and "y" Pete's rate.

We know that Jim completed half the floor in 4 hours, then:

$4x$

And Pete completed the other half of the floor in 2 hours, then:

$2y$

Since Jim completed half the floor and Pete completed the other half:

$4x=2y$ [Equation 1]

We also know that Pete can lay 25 more tiles per hour than Jim, then:

$y=x+25$ [Equation 2]

Then, we can substitute Equation 2 into Equation 1 and solve for "x":

$4x=2(x+25)\\\\4x=2x+50\\\\4x-2x=50\\\\x=\frac{50}{2}\\\\x=25$

Therefore, Jim can lay 25 tiles per hour.

6 0

4 years ago