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Travka [436]
3 years ago
11

Help! I'm trying to solve this for A and B, and it keeps telling me I'm wrong. The equation is:

Mathematics
1 answer:
jenyasd209 [6]3 years ago
3 0

Answer:

A must be 7 and B must be -4

Step-by-step explanation:

Perform the indicated multiplication, obtaining:

7x^(3/2) - 4x  =  Ax^(3/2) + Bx

Then A must be 7 and B must be -4

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Mike works in a toy store. One week, he worked 38 hours and made $220. The next week, he received a raise, so when he worked 30
garik1379 [7]

Answer:

$0.21

Step-by-step explanation:

Let x be the amount of money earned per hour before raise and y be amount of money earned per hour after raise.

We have been given that before raise he worked 38 hours and earned $220. We can represent this information as: 38x=220

We are also told that the next week, he received a raise. After raise he worked 30 hours and made $180. We can represent this information as: 30y=180.

Let us solve for x and y.

x=\frac{220}{38}

x=5.7894736842105263

Therefore, before raise Mike earned $5.7894 per hour.

y=\frac{180}{30}

y=6

Therefore, after raise Mike earned $6 per hour.

Now let us subtract 5.7894 from 6 to find Mike's raise.

\text{Amount of raise}=6-5.7894

\text{Amount of raise}=0.2106\approx 0.21

Therefore, amount of Mike's raise to the nearest cent is $0.21.

8 0
4 years ago
B 13.5 cm 9 cm A 15 cm 12 cm 18 cm what is the value of x?<br>​
Bad White [126]

Answer:

hey sorry I didn't get the question well. hope someone helps

3 0
3 years ago
(2^3 × 2)^2 pls explain how you got it....the answer is 2^8 but I want to know how we get that.
mario62 [17]

Step-by-step explanation:

(2³ × 2¹)²

(2⁶ × 2²)

for indices , × become +, plus

÷ become -, minus

so

2⁶+²

2⁸

6 0
3 years ago
GOD PLZ HELP:: Find x- and y-intercepts. Write ordered pairs representing the points where the line crosses the axes.
Annette [7]

Answer:

x intercept is (3.75, 0) and y intercept is (0, 2.5)

Step-by-step explanation:

4x + 6y - 15 = 0

x int = (3.75, 0)

0*6 = 0

4x - 15 = 0

0 + 15 = 4x = 15

15/4 = 4x

x = 3 3/4 or 3.75

y int = (0, 2.5)

0*4 = 0

6y - 15 = 0

15 = 6y

15/6 = y

y = 2.5

7 0
3 years ago
How long is a guy wire reaching from the top of a 6ft. Pole to a point on the ground 4ft. From the pole
dlinn [17]

Answer:

the guy wire is 7.211 ft long

Step-by-step explanation:

Notice that we are in the presence of a right angle triangle formed by: the height (the standing 6 ft pole), the base (the distance from the pole to the anchoring point on the ground), and the actual guy wire. See attached image for reference.

Notice that since pole and ground are perpendicular to each other (at 90 degrees) , the guy wire forms what is called the "hypotenuse" (longest side) of the right angle triangle. We can therefore use the Pythagorean Theorem to solve this problem with the formula for the hypotenuse:

Hypotenuse=\sqrt{side1^2 +side2^2} \\Hypotenuse= \sqrt{6^2+4^2}\\Hypotenuse=\sqrt{36+16} \\Hypotenuse=\sqrt{52} \\Hypotenuse=7.2111\, ft

4 0
3 years ago
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