All categories

4 years ago

Write a algebra attic expression that models the solution

Mathematics

1 answer:

Nataly [62]4 years ago

7 0

Jenny had $168.
She spends $18 per week (w).

The amount being spent each week is 18w.
She is spending that money, so the number will be going down.

168 - 18w

You might be interested in

Solve for y. y + 8x = 1

BARSIC [14]

Answer:

The value of y is y = -8x + 1.

Step-by-step explanation:

$y + 8x = 1 \\ \frac{ \: \: \: \: \: \: \: \: \: - 8x = - 8x}{y = - 8x + 1}$

▪Happy To Help <3

6 0

3 years ago

The lengths of text messages are normally distributed with a population standard deviation of 4 characters and an unknown popula

umka21 [38]

Answer:

The answer is " $(25.32, 30.68)$ "

Step-by-step explanation:

Given:

$\bar x = 28\\\\ \sigma = 4\\\\n =26\\\\$

When $98\%$ confidence level so, the z:

$\alpha = 1 - 98\% = 1 - 0.98 = 0.2\\\\\frac{\alpha}{2} =\frac{0.02}{2} = 0.01\\\\Z_{\frac{\alpha}{2}} = Z_{0.01} = 1.645\ \ \ ( Using \ z \ table )\\\\$

$E = Z_{\frac{\alpha}{2} \times ( \frac{\sigma}{\sqrt{n}})$

$= 1.645 \times (\frac{4}{\sqrt{26}})\\\\=2.68$

When 98% confidence interval estimate of the population mean is,

$\bar x - E < \mu < \bar x + E\\\\28 - 2.68 < \mu < 28 + 2.68\\\\25.32 < \mu < 30.68\\\\(25.32, 30.68)\\\\$

7 0

3 years ago

A submarine 625 feet below sea level ascends (rises up) 575 feet before descending (submerging down) another 455 feet. Describe

blagie [28]

Answer:

505ft below the surface

Step-by-step explanation:

subtract 575 from 625 and then add 455 to get your final answer.

4 0

3 years ago

Quadratics practice, I need help on how to solve this

lapo4ka [179]

Answer:

Below in bold.

Step-by-step explanation:

x^2 - 2x - 3 = 0

(x - 3)(x + 1) = 0

The zeroes are -1, 3.

Change to vertex form:

= (x - 1)^2 - 1 - 3

= (x - 1)^2 - 4

So the axis of symmetry is x = 1.

The vertex is at (1, -4) and it is a minimum (because the coefficient of x^2 is positive).

Domain is (-∞, ∞)

Range is [-4, ∞).

Increasing when x < 1.

Decreasing when x > 1.

End behaviour x ---- -∞ , y --> ∞

x ----> ∞, y ---> ∞

8 0

3 years ago

Brandon took a 50-question exam worth a total of 160 points. There were x two-point questions and y five-point questions. How ma

astra-53 [7]

Answer:

35 2-point questions, and 15 5-point questions

Assume x 2-points question, so 50-x 5-points question

Total no of points: 2*x+5*(50-x)=145 points

2x+250-5x=145

-3x=-105

x=-105/-3=35 2-points questions

Remaining 50-35=15 5-points questions

ok so i really hope this helped and if it didn't then sorry

7 0

3 years ago