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pishuonlain [190]
3 years ago
15

The cost of two tables and three chairs is $705. If the table costs $40 more than the chair,find the cost of the table and the c

hair
Mathematics
1 answer:
Nadusha1986 [10]3 years ago
8 0

Answer:

the cost of the table is \$165

the cost of the chair is \$125

Step-by-step explanation:

Let

x-----> the cost of the table

y----> the cost of the chair

we know that

2x+3y=705 -----> equation A

x=y+40 -----> equation B

substitute equation B in equation A

2(y+40)+3y=705

2y+80+3y=705

5y=705-80

y=625/5

y=\$125

Find the value of x

x=y+40  ----> x=125+40=\$165

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Answer:

Option D (7, -3)

Step-by-step explanation:

We know that the general equation of an ellipse has the form:

\frac{(x-h)^2}{a^2} + \frac{(y-k)^2}{b^2} = 1

Where the point (h, k) are the coordinates of the center of the ellipse

In this case the equation of the ellipse is:

\frac{(x-7)^2}{4} + \frac{(y+3)^2}{16} = 1

Then

h=7\\\\k = -3

So The coordinates of the center of the ellipse are (7, -3)

8 0
3 years ago
Read 2 more answers
The highest score of the women’s basketball championship was Jessica Bradley. She scored 147 more points and Tina Hardtner her t
Rufina [12.5K]

Answer:

MAKE MY ANSWER BRILLINEST PLEASE:)

Step-by-step explanation:

LET:

j = the points that Jessica scored

t = the points that Tina scored

Jessica scored 147 more points than Tina:

j = t + 1497

Together, Bradley and Harner scored 1601 points:

j + t = 1601

by solving the system of equations:

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j + t = 1601

we find

j = 856 points

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Jessica Bradley scored 856 point.

Tina Harner scored 707 points.

3 0
3 years ago
48 books on 6 shelves. How many books on 12 shelves?
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3 years ago
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3. Last year, the numbers of skateboards produced per day at a certain factory were normally distributed with a mean of 20,500 s
Oxana [17]
Let x be a random variable representing the number of skateboards produced
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b.) P(x ≥ 20,610) = P(z ≥ (20,610 - 20,500)/55) = P(z ≥ 2) = 1 - P(z < 2) = 1 - 0.97725 = 0.02275 = 2.3%

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2 years ago
Help please 878777056586
Yuliya22 [10]

Answer:

The answer is 3

Step-by-step explanation:

Because 4x6=24

2x2x2=8

24 divided by 8=3

Hope this helped and have a great day!

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