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TiliK225 [7]
3 years ago
15

What is the slope of the line 4x+7y=9

Mathematics
2 answers:
Rashid [163]3 years ago
7 0

Answer:

y= - frac4/7 x + frac9/7

Step-by-step explanation:

valentina_108 [34]3 years ago
6 0

Answer:

The slope  is -4/7 and the y- intercept is (0,9/7)

Step-by-step explanation:

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You invested $19,000 in two accounts paying 4% and 8% annual interest, respectively.
saveliy_v [14]

Answer:

$9000 at 4$

and

$10000 at 8%

Step-by-step explanation:

Let's assume that "x" is the amount deposited in the 4% account and "y" is the amount deposited in the 8% account.

Recall the formula for interest as : I= P * R *t

where I is the interest, R is the annual rate of interest and t is the number of years.

Since there are two investments, we need to add both interests at the end of the one year: I1 = x (0.04) (1) = 0.04 x   and   I2 = y (0.08) (1) = 0.08 y

Total Interest = Interest (from the 4% account) + Interest (from the 8% account)

Total Interest = $1160 = 0.04 x +  0.08 y

we also know that the total invested (x + y) adds to $19,000, that is:

$19,000 = x + y

Then we can solve these system of two equations by substitution, for example solving for y in the second equation and using the y substitution in the first equation;

y = 19000 - x

1160 = 0.04 x + 0.08 (19000 - x)

1160 = 0.04 x + 1520 - 0.08 x

0.08 x - 0.04 x = 1520 - 1160

0.04 x = 360

x = 360/0.04 = $9000

Then the other investment was : y = $19000 - $9000 = $10000

6 0
2 years ago
Jeremiah is traveling 70 mph. If Jeremiah keeps driving that speed, how far will Jeremiah be
Mazyrski [523]
70 mph
Mph means miles per hour.
So in five hours, it’d be 70 times 5.
This means in 5 hours, Jeremiah can travel up to 350 miles.
3 0
2 years ago
Read 2 more answers
Sumin bought a pen and a book for $x. the pen cost $5. (a) express the cost of the book in terms of x. (b) if x = 11, find the c
anygoal [31]

Answer:

a. x = total - $5

b. x = $6

c. x = $10

Step-by-step explanation:

a. pen + book = total

Let x = book

$5 + x = total

x = total - $5

b. pen + book = total

Total = 411

$5 + x = $11

x = $11 - $5

x = $6

c. pen + book = total

Total = $15

$5 + x = $15

x = $15 - $5

x = $10

4 0
1 year ago
Explain how to use grouping symbols to organize information appropriately
givi [52]
When there are no special grouping symbols, math problems are solved from left to right. Although there are other important rules about the order in which you do the operations (addition/subtraction/multiplication/division) in a math expression or equation, this lesson will focus on grouping symbols. The rest of the order of operations rules will be explained in the Determining Order of Operations lesson. To help prevent confusion as you learn how to use the grouping symbols, this lesson will only use addition and subtraction.
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3 years ago
Jacob buys a watch costing £84
IceJOKER [234]
So beacause the VAT costsnyou need to move the variable to the left then consider and then thr rate will turn to 0%
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