All categories

3 years ago

Can anyone help me please?

Mathematics

1 answer:

antoniya [11.8K]3 years ago

6 0

Plug in (-1, 3) into both equations

Ax - 2y = 4

A(-1) - 2(3) = 4

-A - 6 = 4 Add 6 on both sides

-A = 10 Divide -1 on both sides

A = -10

5x + By = -1

5(-1) + B(3) = -1

-5 + 3B = -1 Add 5 on both sides

3B = 4 Divide 3 on both side

B = $\frac{4}{3}$

You might be interested in

Mrs Lim bought a number of plates at an average price of $6. She decided to buy another plate which cost $18. The average price

soldi70 [24.7K]

Answer: 6

Step-by-step explanation:

Let x represent the number of plates bought for $6

Let y represent the Total number of plates bought = x + 1

Remember that Mrs. Lim bought another plate for $18

Total cost ÷ Total plates = Average Cost

$\dfrac{6x+18}{x+1}=8\\$

6x + 18 = 8(x + 1)

6x + 18 = 8x + 8

18 = 2x + 8

10 = 2x

5 = x

y = x + 1

= 5 + 1

= 6

5 0

3 years ago

You and a friend want to know how much rope you need to climb a large rock. Your friend is 5.5 feet tall and casts a shadow that

diamong [38]

The concept that is useful in order to answer this item is the concept of ratio and proportion. Let x be the height of the rock from the ground. We use the equation below to answer.
5.5 ft / 18 ft = x ft / 209.5 ft
The value of x from the equation is 64 ft. Thus, they will be needing approximately 64 ft of rope.

4 0

3 years ago

Kevin and Ornella entered a fun run. Their times for completing the course totaled 1 hour 52 minutes. Kevin's time was 4 minutes

masha68 [24]

Answer:

58 minutes

Step-by-step explanation:

Kelvin and Ornella completed the course in 1 hour 52 minutes

60 minutes + 52 minutes

= 112 minutes

Kelvin time is 54 minutes

Kelvin time is 4 minutes less than ornella

Hence Ornella time is 58 minutes

4 0

3 years ago

Please answer and no links please and thank you.

sweet [91]

Answer:

286 mm²

Step-by-step explanation:

A trapezium is given with ,

Parallel sides = 24mm , 28 mm
Height = 11mm .

The area is given by :-

$:\implies$ Area = 1/2 ( b₁ + b ₂) × h

$:\implies$ Area = 1/2 ( 24 + 28)×11 mm²

$:\implies$ Area = 1/2 × 52× 11mm²

$:\implies$ Area = 286 mm²

<h3>Hence the area of the trapezium is 286 mm².</h3>

8 0

3 years ago

Please help me!!!!! You have to match the slope of each line

lys-0071 [83]

Answer:

it would be line to zero slope that's all I can do for u pal maybe..

3 0

3 years ago