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3 years ago

HELP PLEASE

Mathematics

2 answers:

crimeas [40]3 years ago

8 0

Let Jeff's age = x and Ben's age = x - 9.

(x + 10) + (x -9 + 10) = 67

x + 10 + x + 1 = 67

2x + 11 = 67

2x = 56

x = 28

x - 9 = 28 - 9 = 19

Jeff is 28 years old, and Ben is 19 years old.

diamong [38]3 years ago

5 0

If Jeff is x years old, Ben is x - 9 years old.

Ten years later, Jeff would be x + 10 years old and Ben would be (x - 9) + 10 years old.

x + 10 + (x - 9) + 10 = 67
2x + 11 = 67
2x = 56
x = 28

Jeff is 28 right now and Ben is 19 right now.

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What is a1 for the geometric sequence for which a8= -3584 and a3 = 112 ?

Kazeer [188]

Answer:

The first term is 28.

Step-by-step explanation:

Given: 8th term of Geometric sequence , $a_8=-3584$

and 3rd term of Geometric Sequence, $a_3=112$

We have to find First term of given geometric Sequence.

Let a be the first term of geometric sequence.

We know that,

$a_n=ar^{n-1}$

So,

$\frac{a_8}{a_3}=\frac{ar^{8-1}}{ar^{3-1}}=\frac{-3584}{112}$

$\frac{r^{7}}{r^{2}}=-32$

$r^5=-32$

$r=-2$

So, 3rd term = 112

a × (-2)² = 112

a = 112 / 4

a = 28

Therefore, The first term is 28.

4 0

3 years ago

Read 2 more answers

How far is the coordinate (3,5) from the origin? Please answer ASAP.

Andru [333]

Step-by-step explanation:

3, 5 is in quadrant one

calculate the coordinate by: first cordinate is on the x-axis, second coordinate is on the y-axis

answer:

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3 0

3 years ago

Will give brainliest if correct.

Hunter-Best [27]

Answer:

$m=\frac{1}{2}$

General Formulas and Concepts:

Pre-Alg

Order of Operations: BPEMDAS

Alg I

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Step-by-step explanation:

Step 1: Define

Point (3, 14)

Point (-13, 6)

Step 2: Find slope m

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3 years ago

Devon babysits x hours a week after school for 5$ an hour, and also has a job as a cashier y hours a week for $10 an hour. He wa

Papessa [141]

Answer:

The inequality expression are $5x + 10y\geq\$70 \ and \ x + y \leq 10 hours$

Step-by-step explanation:

Given:

Number of hours for babysitting for a week = $x \ hours$

Charge for baby sitting = 5$ an hour

Money earned for babysitting in x hours = $5x$

Number of hours for cashier for a week = $y \ hours$

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Money earned for Cashier in y hours = $10y$

He wants to earn at least 70$.

Hence the expression becomes.

$5x + 10y \geq 70 \$$

Also,

He can’t work any more than 10 hours a week

Hence the expression becomes.

$x + y < 10 \ hours$

Inequality equation for the given statements are:

The inequality expression are $5x + 10y\geq\$70 \ and \ x + y \leq 10 hours$

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Answer:

b false

Step-by-step explanation:

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