4x - 9y = 1
2x + y = -5

Answer:

y=1

x=5/2

Step-by-step explanation:

4x-9y=1

(2x+y=-5)-2

4x-9y=1

-4x-2y=10

_________

-11y=11

y=-1

4x-9y=1

4x-9(1)=1

4x=10

x=10/4

x=5/2

The amount of money in a saving account after t years is represented by the function f(t) = 650(1.027)
What does the value 650 represent in this situation?

The amount of money in the savings account increases by $650 each year.

The amount of money in the savings account is 650 times the amount of the previous year.

The amount of money in the savings account decreases by $650 each year.

The initial amount in the account is $650.​

Cell phone Plan B costs $50 per month but does not come with a phone. If you choose this plan, you will need to purchase a phone for $500. Let x = the number of months and y = the total cost of the cell phone plan. Write an equation to represent the cost of Cell phone Plan B. *

The first company charges $3.50 per cubic foot of rock and $80 for delivery. The second company charges $2.50 per cubic foot of rock and $120 for delivery. Which system of equations can be used to determine the value of the width, x, at which the cost of the two companies, y, is the same?

Question 17 of 25
Which is the graph of the following inequality?
1x1 <3
A
5
-4
-2
-1
0
1
2
3
4
5
B.
-5
4
3
2
1
0
1
2
3
4
5
C.
-5
-4
3
2
-1
0
1
2
3
4
5
D.
-5
-4
-3
-2
1
0
1
2
3
4
5
A. Graph A

Pam is making a border around her garden. She buys 9 bricks for her border. The bricks weigh 27 kilograms in all.

Find g (3) if g(r) = 2r - 1
O 5
07
06
4

Solve 2x2 + 3x = 4. Which of the following are the solutions to the nearest hundredth?
A. 2.35 and 0.85
B. 2.35 and –0.85
C. –2.35 and 0.85
D. –2.35 and –0.85

Which number(s) are 6 units from zero on a number line?
0-6
m 12
M6
03
SUBMIT ANSWER
ASK FOR HELP

2. What is the value of x in the following figure?
520
A. 38°
B. 52°
C. 128°
D. 1420

The are 425 apples in basket A and 381 apples in Basket B. How many apples are there in the two baskets?​

The total cost for 25 camp counselors
to get shirts at $7.50 each and hats
at $5 each, when all members need
a shirt but only some need hats
please help

Which represents z = 3 (cosine (StartFraction 7 pi Over 6 EndFraction) + I sine (StartFraction 7 pi Over 6 EndFraction) )?

Simplify -8n - 7(6n - 6)

Which table of values is correct for the equation
y=-x+3.

1. What are the coordinates of point D?

For Triangle ABC, if AB = 10 mm, BC = 19 mm, and CA = 15 mm, what is the SMALLEST angle measure? * 1 point Angle A Angle BFor Triangle ABC, if AB = 10 mm, BC = 19 mm, and CA = 15 mm, what is the SMALLEST angle measure? *
Angle A
Angle B
Angle C
Cannot be determined Angle C Cannot be determined

heeelp will give brainliest

Mrs. Storz can ride her bike 6000 meters in 15 minutes. How far can she ride in 2 minutes?

♦♦Will mark brainliest♦♦
Anton's family drove 216 mi to the lake averaging 48 ​mi/h​ . On the return trip home they averaged 54 mi/h.

What was the total time that Anton's family spent driving to and from the lake?

8.0 h

8.5 h

9.0 h

9.5 h

PLEASE HELP ME!!!! I WILL GIVE BRAINLIEST!!!!!!
Susan is buying three different colors of tiles for her kitchen floor. She is buying 25 more red tiles than beige tiles, and three times as many navy-blue tiles as beige tiles. If Susan buys 435 tiles altogether, how many tiles of each color does she buy?

Evaluate the expression 9b−6b÷3b for b=7.

A piano teacher gives lessons that are each Three-fourths hour long. How many piano lessons can the teacher fit into a 12-hour work day? Assume no breaks are taken in the 12 hour period.

Would a graph with a slope of 0 and a y intercept of 4 be proportional or not proportional?

Find the range of the function rule y=5x−2 for the domain.{−12, 14, 25}

If 10 cookies cost $2.00, how much will 25 cookies cost? Thank you!

Please help need this done by tonight!!!!!!
Kira wants to graph y = -3(x + 1)(x - 3). They think that it will be a
downward-opening parabola. They think that it has x-intercepts at (1, 0)
and (-3, O). They think that the axis of symmetry, or x-coordinate of the
vertex, will be halfway between 1 and -3, or -1. They substitute that into
their function, and get a y-coordinate of O. So, they graph their work, and
get what is shown. Explain whether you agree or disagree with Kira's work,
and if you disagree, what you think should be done differently. Answer
specifically about x-intercepts, the midpoint and axis of symmetry, and
vertex of the graph.

Which function describes the arithmetic sequence shown? 1, 7, 13, 19, 25, 31

Here are three problems. Select all problems that can be solved using division. Jada cut 4 pieces of ribbon that were equal in length. She used a total of 5 feet of ribbon. How long, in feet, was each piece of ribbon she cut? A chef bought 3 bags of beans. Each bag contains 125 kilograms of beans. How many kilograms of beans did she buy? A printer takes 212 seconds to print a flyer. It took 75 seconds to print a batch of flyers without stopping. How many flyers were in the batch? Andre poured 27 ounces of rice into 6 containers. If all containers have the same amount of rice, how many ounces are in each container? Write an equation to represent the situation. Use a "?" to represent the unknown quantity. Find the unknown quantity. Show your reasoning.

A sequence is defined by the recursive function f(n + 1) = one-halff(n). If f(3) = 9 , what is f(1) ? 1 3 27 81

PLZZZ HELPPP Read the excerpt from "The New Marvel in Photography" by H. J. W. Dam.

In all the history of scientific discovery there has never been, perhaps, so general, rapid, and dramatic an effect wrought on the scientific centres of Europe as has followed, in the past four weeks, upon an announcement made to the Würzburg Physico-Medical Society, at their December meeting, by Professor William Konrad Röntgen, professor of physics at the Royal University of Würzburg. The first news which reached London was by telegraph from Vienna to the effect that a Professor Röntgen, until then the possessor of only a local fame in the town mentioned, had discovered a new kind of light, which penetrated and photographed through everything. This news was received with a mild interest, some amusement, and much incredulity; and a week passed. Then, by mail and telegraph, came daily clear indications of the stir which the discovery was making in all the great line of universities between Vienna and Berlin. Then Röntgen's own report arrived, so cool, so business-like, and so truly scientific in character, that it left no doubt either of the truth or of the great importance of the preceding reports. . . .

Exactly what kind of a force Professor Röntgen has discovered he does not know. As will be seen below, he declines to call it a new kind of light, or a new form of electricity. He has given it the name of the X rays.

The central idea of this excerpt is developed through

scientific proof.
cautious excitement.
medical facts.