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2 years ago

Will mark brainliest (NO LINKS OR ANSWERS WITHOUT EXPLANATION)

Mathematics

2 answers:

Ilia_Sergeevich [38]2 years ago

6 0

Answer: i think the answer is 6x2−xy−35y2

LenKa [72]2 years ago

3 0

Answer:

6x² -xy -35y²

Step-by-step explanation:

Use the distributive property, and combine terms.

(2x +5y)(3x -7y) -2xy

= 2x(3x -7y) +5y(3x -7y) -2xy

= 6x² -14xy +15xy -35y² -2xy

= 6x² +(-14 +15 -2)xy -35y²

= 6x² -xy -35y²

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Carissa also has a sink that is shaped like a half sphere. The sink has a volume of 4000/ 3 * π in 3. One day, her sink clogged.

givi [52]

Answer:

Part a) 119 cups

Part b) 30 cups

Step-by-step explanation:

Part a)

step 1

Find the volume of the conical cup with a diameter of 4 in. and a height of 8 in

The volume of the cone (cup) is equal to

$V=\frac{1}{3}\pi r^{2}h$

we have

$r=4/2=2\ in$ ----> the radius is half the diameter

$h=8\ in$

assume

$\pi =3.14$

substitute

$V=\frac{1}{3}(3.14)(2^{2})8=33.49\ in^3$

step 2

Find out how many cups of water must Carissa scoop out of the sink

Divide the volume of the sink by the volume of the cup

$\frac{4,000}{33.49}= 119\ cups$

Part b)

step 1

Find the volume of the conical cup with a diameter of 8 in. and a height of 8 in

The volume of the cone (cup) is equal to

$V=\frac{1}{3}\pi r^{2}h$

we have

$r=8/2=4\ in$ ----> the radius is half the diameter

$h=8\ in$

assume

$\pi =3.14$

substitute

$V=\frac{1}{3}(3.14)(4^{2})8=133.97\ in^3$

step 2

Find out how many cups of water must Carissa scoop out of the sink

Divide the volume of the sink by the volume of the cup

$\frac{4,000}{133.97}= 30\ cups$

7 0

2 years ago

What is equivalent to12/18

solmaris [256]

<span>2/3 and 24/36 and 6/9
for 2/3 just dvide by 6, 24/36 just multiply both terms by 2 and for 6/9 just divide by 2</span>

3 0

2 years ago

Read 2 more answers

When CA= 3x-1 and SR=5x+4, what is CA?

avanturin [10]

Answer:

CA=17

Step-by-step explanation:

From given picture we see that A and C are the mid points of sides QR and QS respectively.

We know that line joining mid points of the two sides of triangle is always half of the length of the third side.

So that means:

2*CA=SR

2(3x-1)=5x+4

6x-2=5x+4

6x-5x=4+2

x=6

plug value of x into CA=3x-1

CA=3*6-1=18-1=17

Hence final answer is CA=17

8 0

2 years ago

2m=p-q/r solve for r

Oduvanchick [21]

To solve for r, you would start by subtracting p from both sides.

2m - p = -q/r

Multiply everything by r.

2mr - pr = -q

Factor r out of the left side of the equation.

r(2m - p) = -q

Divide both sides by (2m - p).

r = $\frac{-q}{2m-p} = \frac{q}{2m + p}$ .

6 0

3 years ago

After looking through different hotel options, Gabriela and Luis decided to estimate a budget of $1200 for hotel costs. They wan

MatroZZZ [7]

Answer:

i think its 6c+240=1200

Step-by-step explanation:

6 = amount of nights

240=tax

c = total cost a night

1200 = budget

6 0

2 years ago

Read 2 more answers