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3 years ago

-4-7=? I dont really understand

Mathematics

1 answer:

Anit [1.1K]3 years ago

5 0

-4 + -7= -11

When adding negative numbers if the are both negative then you add them. When you have a negative and a positive you subtract. In this problem they just took out the plus sign.

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PLEASEEEE HELP ITS URGENT!!!!

Marrrta [24]

Answer:

f(x)=1/2x-6

Step-by-step explanation:

7 0

3 years ago

Ella has 0.5 lbs of sugar. How much water should she add to make the following concentrations? Tell Ella how much syrup she will

HACTEHA [7]

Ella has to add 32.833 lbs of water to get 33.333 lbs of syrup.

<u>Solution:</u>

Ella has 0.5 lbs of sugar. Let x lbs be the amount of water Ella should add to get the 1.5% of syrup,

$\Rightarrow0.5\text{ lbs }- 1.5\%$

$\Rightarrow x+0.5\text{ lbs }- 100\%$

On writing the proportion,

$\Rightarrow\dfrac{0.5}{x+0.5}=\dfrac{1.5}{100}\\ \\\Rightarrow0.5\cdot 100=(x+0.5)\cdot 1.5\\ \\\Rightarrow50=1.5x+0.75\\ \\\Rightarrow1.5x=50-0.75\\ \\\Rightarrow1.5x=49.25\\ \\\Rightarrow x=\dfrac{49.25}{1.5}\approx 32.833\ lbs$

To get 1.5% syrup Ella should add 32.833 lbs of water. The total weight of syrup is 33.333 lbs.

7 0

3 years ago

Students of Jesus and Mary were divided into 6 teams for a football game. if the school comprises of 3,900 students,how many stu

gtnhenbr [62]

Answer:

49 students/7 teams= 7 students per team

49/7=7

i hope this work for you

and sory if im wrang

3 0

2 years ago

Can someone solve these two for me pls ill give brainliest

NISA [10]

Answer:

1.) -5

2.) -4

Step-by-step explanation:

For number 1, you sub in -2 for x.

2 multiplied by -2 is -4, minus 1 = -5.

For the second one, sub in 5 for x.

-5 + 1 = -4.

6 0

2 years ago

Write the equation of a line that is perpendicular to the given line and that passes through the given point.

poizon [28]

Answer: y=-3x+29

Step-by-step explanation:

First put in y-intercept form to find the slope

$4x-12y=2\\-12y=-4x+2\\y=\frac{1}{3} x-\frac{1}{6}$

Slope of the 1st equation is 1/3- the slope of the line perpendicular is the opposite reciprocal, so in the case it is -3

Use the point and the new slope to write the new equation in point slope format

$y-y_{1} =m(x-x_{1} )\\y-(-1)=-3(x-10)\\y+1=-3x+30\\y=-3x+29$

8 0

3 years ago