HELP!!! ASAP MARKING BRAINLIEST!!!!

x = -2, y = -1

Substitution method:

2x + 3y = -7

y = 8x + 15

2x + 3(8x + 15) = -7

2x + 24x + 45 = -7

26x = -52

x = -2

Substituting x value back into 1st equation for y:

2(-2) + 3y = -7

3y = -3

y = -1

Answer:

a = b = c = 45°

Step-by-step explanation:

[tex]In\: \triangle BDC, \\\\

BD = CD.... (given) \\\\

\therefore m\angle DBC =m\angle DCB\\(By\: isosceles \:\triangle\: property) \\

\therefore a\degree = b\degree.... (1)\\\\

m\angle BDC= 90\degree \\\\

\because m\angle BDC + a\degree + b\degree=180\degree \\\\

90\degree+ a\degree + a\degree=180\degree\\ [from \: equation \: (1)]\\\\

2a\degree=180\degree -90\degree\\

2a\degree= 90\degree\\\\

\therefore a\degree=\frac{ 90\degree}{2} \\\\

\huge\purple {\boxed {\therefore a\degree=45\degree}} \\\\

\implies \huge\red {\boxed { b\degree=45\degree}} \\\\

In\: \triangle ABC, \\\\

AB = BC.... (given) \\\\

\therefore m\angle BAC =m\angle BCA\\(By\: isosceles \:\triangle\: property) \\

\therefore c\degree = b\degree\\\\

\because b\degree=45\degree \\\\

\implies \huge\orange {\boxed { b\degree=45\degree}} [[/tex]

in this you would mainly look at the tenths place, and put 0's at the end till you get to the thousandth's place.

7.990, 7.800, 7.200, 7.141.

Answer:

this is false

Step-by-step explanation:

-2 is accually greater than 2

so, for this to be correct it would have to be:

[tex]0 > - 2[/tex]

Answer:

the ratio is 1:3 for brown sugar to sugar

Answer:

Step-by-step explanation:

according to the midsegment theorem, a midsegment of a triangle is parallel to a side of a triangle and its length is 1/2 length of the side.

1/2FG= 15, SO FG=30,

1/2 GH=36 SO GH=72

AREA = 1/2(72*30)=1080 CM^2

Answer:

1/2(72*30)=1080 CM^2

Step-by-step explanation:

don't rember how i got it, just remeber having this question on my work.

Answer:

145 x 2 + 7 = 297

- I hope this helps have a great night!

Answer:

297 is the sum.

99 x 3 + 0 = 297 or 58 x 5 + 7 = 297 are the solutions to the "?"

Step-by-step explanation:

Well, the sum of a number is the answer of something when doing addition, so technically, this is already revealed.

If you meant what numbers the question marks represent, then this could be a number of answers. However, the easiest solutions would be:

99 x 3 + 0 = 297 or 58 x 5 + 7 = 297

Hope this helps! :)

Answer:

A. 354.20 + 50.60w ≥ 1,099.51

Step-by-step explanation:

$354.20 (her savings)

$50.60 (what she can save every week)

she need to get to a total of (at least) $1,099.51

354.20 (she already have) + 50.60 per week it need to be equal or more than 1,099.51

354.20 + 50.60w ≥ 1,099.51

Answer:

X = 41  

y = 7.22

Step-by-step explanation:

Answer: y=8-6x

Step-by-step explanation:

Answer:

a. han did not divide -10x by 4

b. y intercept:5, x intercept:2

Step-by-step explanation:x

reason for b: you can graph y=-[tex]\frac{5}{2}[/tex]x+5 to get the y and x intercept

Answer:

x=1

Step-by-step explanation:

Answer:

1

Step-by-step explanation:

I hope this helps. In this case -4+-4x is -8 so then u know it's 1 because 2 negatives equals a negative and 4+4 is 8 all I did was change change the subtraction to addition if that make sense khan academy has some good video on integers.

Answer:

D. 29

Step-by-step explanation:

180 - 151 = 29

Answer:

pls write the question clearly

Step-by-step explanation:

hxhdhdudjfjfjfjfjjfucjdjshshsshsh

The statements that is true: B. The percent error of the prediction was about 55%.

D. Difference between the predicted and actual rainfall was 1.2 inches.

Percentage error can be calculated  using this formula;

Percentage error = Actual value observed - Expected value /Expected value

The Percentage error is;

= 2.2 - 1.0 / 2.2

Percentage error = 1.2 /2.2

Percentage error = 0.545 × 100

Percentage error = 55% (Approximately)

Since Difference between the predicted and actual rainfall;

Difference = Actual rainfall - Predicted rainfall

Difference = 2.2 -1.2

Difference = 1.2 inches.

Hence the correct statement is option B and D.

Learn more about percentage error;

brainly.com/question/28746643

#SPJ2

Answer:

-8

Step-by-step explanation:

search up this website for the steps:

symbolab is the website

Answer:

That is a false equation

Step-by-step explanation:

The negative can't coninspire with the final result. There is no answer It is invalid. Your in collage. Lay off the parties and learn the basic functions of math

Answer:

2.25 or 2 1/4 pounds

Step-by-step explanation:

if you add them all up (I converted them to decimals when adding) you get 13.5 or 13 1/2 if your using fractions, then you divide that by 6 because thats how many jars there are and you get 2.25 or 2 1/4

Answer:

cb

Step-by-step explanation:

Answer:

£365 is cheaper than  €425.

Step-by-step explanation:

We want to convert both prices to the same currency. It is easier to convert pounds to euros, as the exchange rate uses £1.

€425 or £365

£365 = €(365 * 1.14)

£365 = €416.10

€425 > €416.10

£365 is cheaper than  €425.

Answer:

3/4, 4/5, 3, 3, 3.5

Answer:

3.5,3 3/4,3 4/5

Step-by-step explanation:

Answer:

Y = 40

Step-by-step explanation:

Change 1/2 to 2/4

2/4 y + 6 = 3/4y - 4

subtract 2/4y

6 = 1/4y -4

add 4

10 = 1/4y

multiply by 4 to get fraction to 1y or y

y = 40

Answer:

Each person would get 1/6 of the pizza

Step-by-step explanation:

1/3 divided by 2 is 1/6. Do that again and you will get four of 1/6.

Answer:

ANSWER

Let one number  = x

other number      = 2x-3  

(x+2x−3)+7=37

3x = 33

x = 11

∴ The two number are 11 and 19

Answer:

The total cost is $32.40

Step-by-step explanation:

9.91 x 4 = 39.64

25% of 39.64 is 9.91

39.64 - 9.91 = 29.73

6.75% of 39.64 is 2.67

29.73 + 2.67 = 32.40