All categories

3 years ago

Solve the following system by the substitution method 0.1x + 0.8y = - 5.1 , 0.4x- 0.9y = 8.3

Mathematics

1 answer:

Sav [38]3 years ago

6 0

I hope you can read cursive! And I hope this helps! (:

You might be interested in

Please help me !!!!!! 1. 12a-6b + 4 2. 4x-2y 3.c - 33 4.3x +2

kiruha [24]

Answer:

I dont know sowy i jus nedd moar pointses

Step-by-step explanation:

4 0

2 years ago

HELP say im getting it wrong the perimeter of the polygons is ?

lara [203]

So the answer would be16*4=64

8 0

3 years ago

What is an equation of the line that passes through the points (0, -4) and (-4, 6)?

olganol [36]

Answer:

The equation of the line is.

$y=-\frac{5}{2}x-4$

Step-by-step explanation:

Given:

The given points are (0, -4) and (-4, 6)

The equation of the line passing through the points $(x_{1},y_{1})$ and $(x_{2},y_{2})$ is.

$\frac{x-x_{1}}{x_{2}-x_{1}}=\frac{y-y_{1}}{y_{2}-y_{1}}$

Thus, the equation of the line that passes through the points (0, -4) and (-4, 6) is

$\frac{x-0}{(-4)-0}=\frac{y-(-4)}{6-(-4)}$

$\frac{x}{-4}=\frac{y+4}{6+4}$

$-\frac{x}{4}=\frac{y+4}{10}$

$-\frac{10x}{4}=y+4$

$-10x=4(y+4)$

$-10x=4y+16$

$4y=-10x-16$

The above equation is divided by 2 both sides.

$2y=-5x-8$

$y=-\frac{5}{2}x-4$

Therefore, the equation of the line that passes through the points (0, -4) and (-4, 6) is $y=-\frac{5}{2}x-4$

8 0

3 years ago

A humpback whale can eat 4.4 x 10^3 plankton a day during feeding season. If the feeding season lasts 120 days, find the total n

dolphi86 [110]

Answer:

An average-sized blue whale will eat 2,000-9,000 pounds (900-4100 kg) of plankton each day during the summer feeding season in cold, arctic waters ( about 120 days).

Step-by-step explanation:

8 0

3 years ago

Nathan has $40 in a savings account. The interest rate is 5% per year and is not

fgiga [73]

Money with Nathan in his savings account = $40

Rate of interest per annum = 5%

We know that :

$\color{hotpink}\tt \: simple \: interest \color{plum}= \frac{principal \times rate \times time}{100}$

In this case :

Principal = $40

Rate = 5%

Time = 1 year

Simple interest he will earn in 1 year :

$=\tt \frac{40 \times 5 \times 1}{100}$

$= \tt \frac{200}{100}$

$\color{plum} =\tt\$ \: 2$

Amount = Principal + Interest

Amount Nathan has to pay at the end of one year :

$= \tt40 + 2$

$\color{plum} =\tt \$42$

Thus, at the end of 1 year Nathan has to pay $42.

Therefore, simple interest Nathan will earn in 1 year = $2

6 0

3 years ago