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3 years ago

Which are the solutions of x^2=-7-8?

Mathematics

2 answers:

maxonik [38]3 years ago

5 0

Answer:

No Real Solutions

Step-by-step explanation:

Move the constants to the left now your equations is $x^{2}$ -7+8=0

Now you calculate -7+8=0 now your equation is $x^{2}$ +1=0

Calculate the discriminant: Determine the number of solutions using the discriminant D= $b^{2}$ -4ac

D= $0^{2}$ -4 x 1 x 1

Simply the expression

D= -4

Since D<0, the quadratic equation has no real solutions

Serhud [2]3 years ago

3 0

Answer:

I don't think there are any solutions... (No solution)

Step-by-step explanation:

$x^{2}$ =-7-8

Simplify

$x^{2}$ =-15

To isolate x square both sides:

$\sqrt{x}$ = $\sqrt{-15$

-15 cannot be squared since it is negative. Therefore, there is no solution.

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Solve for p. 5=4p−13 p=72 p = 4 p = 7 p = 64

liraira [26]

Answer:

p=4

Step-by-step explanation:

5=4p-13

5+13=4p

18=4p

18/4=p

4.5=p

4 0

2 years ago

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Michael has a sink that is shaped like a half-sphere. The sink has a volume of 3000 3 in3. One day, his sink is clogged. He has

jarptica [38.1K]

Answer:

Part a) $42\ cups$

Part b) $15\ cups$

Step-by-step explanation:we know that

The volume of the sink (half sphere) is equal to

$V=3,000\pi \ in^{3}$

Part a) One cup has a diameter of 6 in. and a height of 8 in. How many cups of water must Michael scoop out of the sink with this cup to empty it?

The volume of the cylinder is equal to

$V=\pi r^{2}h$

we have

$r=6/2=3\ in$ ----> the radius is half the diameter

$h=8\ in$

substitute the values

$V=\pi (3)^{2}(8)=72\pi\ in^{3}$

To find the number of cups divide the total volume of the sink by the volume of the cylinder

$\frac{3,000\pi}{72\pi} =41.67\ cups$

Round to the nearest whole number

$41.67=42\ cups$

Part b) One cup has a diameter of 10 in. and a height of 8 in. How many cups of water must Michael scoop out of the sink with this cup to empty it?

The volume of the cylinder is equal to

$V=\pi r^{2}h$

we have

$r=10/2=5\ in$ ----> the radius is half the diameter

$h=8\ in$

substitute the values

$V=\pi (5)^{2}(8)=200\pi\ in^{3}$

To find the number of cups divide the total volume of the sink by the volume of the cylinder

$\frac{3,000\pi}{200\pi} =15\ cups$

4 0

3 years ago

Ming wants to make a 40% sugar solution. She had already poured 3 L of a 80% sugar solution into a beaker. How many L of a 10% s

jeyben [28]

Answer:

Ming must add 0.375 L of a 10% sugar solution

Step-by-step explanation:

if 3 L = 80%

1.5 L should = 40% (since it is half of 80%)

and if 40 divided by 4 = 10%

1.5 also needs to be divided by 4

so 1.5 divided by 4 = 0.375

that means Ming must add 0.375 L of a 10% sugar solution

5 0

4 years ago

MATH HELP!!!!!!!!!!!!!!1

torisob [31]

Answer:

n = 18

Step-by-step explanation:

when you are multiplying, you add the exponents. 2 + x = 20. so by using subtraction we find that x = 18.

5 0

3 years ago

Find the area of the shape below.

Alecsey [184]

Area = (14 x 20) - ( 5 x 9)

Area = 280 - 45

Area = 235 square cm

4 0

2 years ago

Read 2 more answers