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3 years ago

15

Alexis received an 85, 89, and 92 on three tests. How many points does she need to score on her next test in order to have an av

erage of at least 90?

1 answer:

Tpy6a [65]3 years ago

6 0

Alexis needs to score at least 96 points on her next test in order to have an average of at least 90.

explanation:
85+89+92+96= 360
359/4=90

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sandra raised 15 dollars for pta and nita raised 45 dollars how many times as much money did nita raise as compared to sandra

OlgaM077 [116]

Answer:

3 times (3x)

Step-by-step explanation:

Sandra raised 15 dollars.

Nita raised 45

45 divided by 15 is 3

3 * 15 = 45

7 0

2 years ago

Find the value of the expression 0.5^10/0.5^7

SIZIF [17.4K]

Answer:

The solution is:

$\frac{0.5^{10}}{0.5^7}=0.125$

Step-by-step explanation:

Given the expression

$0.5^{10}\div 0.5^7$

Solving

$\frac{0.5^{10}}{0.5^7}$

$\mathrm{Apply\:exponent\:rule}:\quad \frac{x^a}{x^b}=x^{a-b}$

so

$\frac{0.5^{10}}{0.5^7}=0.5^{10-7}$

$\mathrm{Subtract\:the\:numbers:}\:10-7=3$

$=0.5^3$

$=0.125$ ∵ $0.5^3=0.125$

Therefore, the solution is:

$\frac{0.5^{10}}{0.5^7}=0.125$

7 0

2 years ago

Solve for x and then part b) find JL. Have no clue how to go about this

Igoryamba

9514 1404 393

Answer:

x = 4
JL = 16

Step-by-step explanation:

a) You go about this by using the given equation.

Left + Right = Total

JK + KL = JL

(2x -3) + 11 = 4x

8 = 2x . . . . . simplify, subtract 2x

4 = x . . . . . . divide by 2

__

b) JL = 4x = 4·4

JL = 16

8 0

2 years ago

NEED HELP ASAP! <br><br> What is the value of x? <br><br><br><br> x =

rjkz [21]

The Intersecting Secant Theorem says

EC × ED = EB × EA

(x+4)(x+4+1) = (x+1)(x+1+11)

(x+4)(x+5)=(x+1)(x+12)

x^2 + 9x + 20 = x^2 + 13 x + 12

8 = 4x

x = 2

Check:

6(7)=42

3(14)=42, good

Answer: 2

7 0

3 years ago

U= 2a - 2. solve for a

Sonja [21]

Answer: a = $\frac{u+2}{2}$

We want to isolate a. Add both sides by 2. Then we get u + 2 = 2a. To get just a, we can divide by 2 to get (u+2)/2.

Hope that helped,

-sirswagger21

8 0

3 years ago

Read 2 more answers