solve this system using elimination. 3x - 4y = -5, -10x + 4 = 12

Answer:

x = -4/5, y = 13/20

Step-by-step explanation:

-10x + 4 = 12

-10x = 8

x = -4/5

3x - 4y = -5

3(-4/5) - 4y = -5

-12/5 - 4y = -5

-4y = -13/5

y = 13/20

Double check:

3x - 4y = -5

3(-4/5) - 4(13/20) = -5

-12/5 - 13 = -5 (true)

#17. The height, H metres, of a certain species of Fir
tree can be estimated from the formula.
h= 35d , where d metres is the diameter at the
base. use the formula to determine the approximate
height of a fir tree with base diameter 3.2 m.

Write an equation for the function whose graph is described.
The shape of f(x) = |x|, but shifted 19 units up and then reflected in the x-axis

suzette went to the store and bought some eye liner for $2.50. two weeks later, the price of the eyeliner was increased by 50%. what was the new price of the eyeliner

Find the x and y intercepts Y-2xy+4x=1

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5) A book is sold at $152.50 and a discount of 9% is given for students.
Find the cost of the book.
13

Using the equation 2 + 3/41 = 5, what does the value of I equal?

help i need help on this​

PLEASE HELP WILL GIVE LOTS OF POINTS & BRAINLY!!

The results of a magazine survey showed that 42 out of 80 people plan to vote for Mr. Smith for President. Which is the best prediction of the total number of votes he will receive if 2,000 people vote?

A.
25

B.
50

C.
120

D.
1,050

A 440-yard race had ten athletes which ran for the following times (in seconds): 46.9, 48.9, 46.7, 46.2, 46.5, 47.2,47.5,46.1, 48.9, and 46.4 . What is the mean of the three fastest runners?

What is the range of the data below? 6.5, 7.6, 9.1, 2.4, 8.8​

Y multiplied by 2 1/2

9.Patients who are addicted to cocaine are sometimes using the drug to combat
depression. As such, sometimes addicts are given antidepressant medications to
prevent relapse. A three-year study compared the effects of two such medications,
lithium and desipramine, along with a placebo for 72 cocaine users wishing to break
the habit. The patients were put into 3 groups of 24, and given 1 of the 3 treatments at
random. This two-way table illustrates the results.
Treatment Relapse No relapse Total
Desipramine 10 14 24
Lithium 18 6 24
Placebo 20 4 24
Total 48 24 72
According to the table, 48 of the addicts relapsed regardless of the treatment given.
This number is an example of a
A. relative frequency
B. marginal frequency.
C. conditional relative frequency.
D. joint frequency

Question is in the Picutre attached.

Please help me answer this!!!

If it is equal to (or) greater than 5, add__ to previous digit
(a)1
(b)0
(c)10​

-8h+z/7
Use z=21 and h=4

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Shannon drank 1/5 cup of milk
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Answer

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[tex]3.5 \times 500 = [/tex]
​

Decrease £313 by 62%

Select all the ratios that are equivalent to 8 : 6. *

4:3
6 to 8
16:12
10:8
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130 3x + 67 degrees
please please please please please please please help​

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Consider a 95 percent confidence interval constructed for the difference between two population
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appropriate interpretation of the confidence level?
In repeated random sampling with the same sample size, êr - Ộs will be contained in
the interval approximately 95 percent of the time.
In repeated random sampling with the same sample size, PR will be contained in the
interval approximately 95 percent of the time.
In repeated random sampling with the same sample size, Ôr will be contained in the
interval approximately 95 percent of the time.
The probability is 0.95 that the difference in the sample proportions PR - Ổs is between
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In repeated random sampling with the same sample size, approximately 95 percent of the
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A cylinder is sliced horizontally, parallel
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Circle and triangle
Circle and rectangle
Circle and hexagon
Circle and sphere

I need help please please help

Plsssss help plssss ASAP plssss I beg u plsssssssssssssssssssss it’s so hard :((((
Which situation is a true statement about payment options?

CLEAR CHECK

A) An advantage of online banking is that you do not need to keep detailed records when paying bills.

B) Paying with a credit card means the amount you spend will be deducted from your checking account.

C) Keeping track of your debit card transactions will help avoid charges resulting from insufficient funds.

D) To avoid paying interest on your credit card purchases, pay only part of your balance each month.

Jessica has an account with a credit union. Her account earns 2.6% simple interest yearly. Exactly a year and a half ago, she opened her account with $900.

How much interest has she earned so far?
A.
$35.10
B.
$2,340.00
C.
$46.80
D.
$28.08
pls someone help im very confused