3 years ago

PLEASE ANSWER THIS QUESTION

Mathematics

1 answer:

Marta_Voda [28]3 years ago

3 0

Answer: 31 is No 35 is Yes 28 is No 36 is Yes

You might be interested in

When adding 3 and -9, how do you know that the sum is negative?

irga5000 [103]

You know the sum is negative because the negative integer is larger than the positive integer.

7 0

3 years ago

What quantity of 75 per cent acid solution must be mixed with a 30 per cent solution to produce 1080 mL of a 50 per cent solutio

Jlenok [28]

Answer: 480 mL, 600 mL

Step-by-step explanation:

Given

The concentration of the first acid is 75%

The concentration of the second acid is 30%

The final mixture has a concentration of 50%

The final volume is 1080 mL

Suppose x and y be the volume of the first and second acid

$\therefore x+y=1080\quad \ldots(i)\\0.75x+0.3y=0.5\times 1080\quad \ldots(ii)$

Solving the above equations we get

$x=480,y=600$

So, the quantity of the first acid is 480 mL and 600 mL for the second mixture.

6 0

3 years ago

Ben has 90 in his saving account. He plans to deposit 36 per week to build his account balance

Gelneren [198K]

Answer:

he will increase his account balance by $20 a year

Step-by-step explanation:

7 0

3 years ago

The radius of a circle is 6 inches. What is the length of a 135-degree arc?

svp [43]

14.14 inches

Convert 135° into radians. 135*2pi/360=3pi/4.
6*3pi/4=18pi/4=9pi/2=14.14

Another viable method is to do 2pi*6*135/360=14.14

8 0

2 years ago

Does anyone know how to answer this question I'm having a lot of trouble with it?

Helen [10]

Answer:

h = $\frac{2A}{(b+c)}$

Step-by-step explanation:

Formula for the area of a trapezoid is,

Area (A) = $\frac{1}{2}(b+c)h$

Here b and c are the bases and 'h' is the height of the trapezoid.

2A = $2[\frac{1}{2}(b+c)h]$

2A = (b + c)h

$\frac{2A}{(b+c)}=h$

Therefore, formula for the height of the trapezoid will be,

h = $\frac{2A}{(b+c)}$

5 0

3 years ago