3 years ago

4 - (-3) simplify the expression

Mathematics

2 answers:

mario62 [17]3 years ago

6 0

Answer:

Step-by-step explanation:

4-(-3)=4+3 (negative times negative is positive)

4+3=7

Hope that helps!

Blizzard [7]3 years ago

6 0

I think it’s 7 because that’s what somebody else said

You might be interested in

The coordinate (1,3) is a solution to 2x-3y=-7 True False

Natalija [7]

True because just plug in (1,3) for x and y and solve it out.
Plugging it in gives you 2(1)-3(3)=-7 which simplifies to 2-9=-7, which is true.

5 0

4 years ago

Descent, Inc., produces a variety of climbing and mountaineering equipment. One of its products is a traditional three-strand cl

Rainbow [258]

Solution :

Assuming $\sigma_1^2=\sigma_2^2$

We have to test

$H_0:\mu_1=\mu_2$

Against $H_a: \mu_1 \neq \mu_2$

Level of significance, $\alpha = 0.05$

$s_p=\sqrt{\frac{(n_1-1)s_1^2+ (n_2-1)s_2^2}{n_1+n_2-2}}$

$s_p=\sqrt{\frac{(25-1)(425)^2+ (20-1)(415)^2}{25+20-2}}$

= 420.6107

Under $H_0$ , the t-statistics is as follows:

$t=\frac{(\overline{x_1} - \overline{x_2})}{s_p\sqrt{\frac{1}{n_1}+\frac{1}{n_2}}} \sim$ $\text{t with }(n_1+n_2-2) \ DF$

$t=\frac{(7200-7087)}{(420.6107)\sqrt{\frac{1}{25}+\frac{1}{20}}}$

= 0.90

DF = (25 + 20 - 2)

= 43

P-value of the test = 0.375

Since the p value is more than 0.05, we fail to reject our null hypothesis.

There is no difference between then mean tensile strength of the ropes that is produced in the Bozeman and Challis.

3 0

3 years ago

Two positive improper are multiplied. Is the product sometimes, always, or never less than 1? EXPLAIN.

TEA [102]

The answer is sometimes less than 1

7 0

3 years ago

WILL GIVE BRAINLIEST, PLEASE HELP

insens350 [35]

Option B is the odd one out

3 0

3 years ago

Read 2 more answers

What digit is in the tenths place in this number? 748.59

Kamila [148]

5 would be the digit in the tenths place

4 0

3 years ago

Read 2 more answers