All categories

3 years ago

2x-y=-4-2x+y=3How to solve using systems elimination

Mathematics

1 answer:

VikaD [51]3 years ago

4 0

Two -2x and 2x cancel out since there opposites

As well as y

Then your answer should be 0=-1

You might be interested in

I'm not sure if D is right

Rzqust [24]

Ratio and proportion

height :legnth of shadow=56:49 (man's shadow)
we assume the ratio is the same for the tower thing (obelisk)

so
56:49=x:28
conver tto fraction
56/49=x/28
times both sides by 28
1568/49=x
32=x
answer is 32ft

5 0

3 years ago

What is the value of 2y- 6 if y = 12

Likurg_2 [28]

Answer:19

Step-by-step explanation:

The answer is 19 because you need to do 12*2 and then subtract 6. 24-6=19

3 0

3 years ago

Read 2 more answers

A pole that is 2.5 m tall casts a shadow that is 1.47 m long. At the same time, a nearby tower casts a shadow that is 36.25 m lo

Roman55 [17]

The tower is 61.65 meters tall.

<u>SOLUTION: </u>

Given that, a pole that is 2.5 m tall casts a shadow that is 1.47 m long.

At the same time, a nearby tower casts a shadow that is 36.25 m long.

We have to find height of the tower.

Now, we know that,

$2.5 \mathrm{m} \text { tall } \rightarrow 1.47 \text { long shadow }$

Then, (let it be) n meter tall $\rightarrow$ 36.25 long shadow

So, by cross multiplication method,

$\Rightarrow \frac{2.5}{1.47}=\frac{n}{36.25}$

This can be written as,

$\Rightarrow 36.25 \times 2.5=1.47 \times n \rightarrow 1.47 n=90.625 \rightarrow n=61.649 \rightarrow n=61.65 \text{ m}$

Cross multiplications steps: (To find Single Variable)

Multiply the numerator of the left-hand fraction by the denominator of the right-hand fraction.
Multiply the numerator of the right-hand fraction by the denominator of the left-hand fraction.
Set the two products equal to each other.
Solve for the variable.

6 0

3 years ago

A box of blueberries is 2/5 full. Janet and her friends had each eaten 1/10 of a box of blueberries. How many people are blueber

anyanavicka [17]

In this problem, we have to find the factor which will make (1 / 10) equal to (2 / 5). Therefore we can write it as:

x (1 / 10) = 2 / 5

where x is the number of people who ate the blueberries

x = (2 / 5) / (1 / 10)

x = 4

<span>Therefore 4 people ate the blueberries.</span>

7 0

3 years ago

Read 2 more answers

What is the product?

aleksley [76]

Answer:

The first one

Step-by-step explanation:

8 0

3 years ago

2x-y=-4-2x+y=3How to solve using systems elimination ​

2x-y=-4-2x+y=3How to solve using systems elimination